TWI498168B - Method and device for adjusting cohesive material coating - Google Patents

Description

Viscous material coating adjustment method and device

The invention relates to a method and a device for coating a viscous material, in particular to a contact type in which a high-viscosity viscous material is driven by a screw-type extrusion and the dispensing machine must be coated along the coating path with a target coating weight. Continuously applied viscous material coating adjustment method and device.

Conventional technology in semiconductor chip packaging, flat panel display manufacturing, usually using a dispenser to extrude the viscous material into a predetermined pattern on the object to be coated, wherein the commonly used dispensers actuate the extrusion method such as air pressure Dynamic, rotational actuation or piezoelectric actuation; these viscous materials include general functional adhesives, fluxes, solder masks, sealants, etc., with a viscosity greater than 50 centipoise (CPS), not easily at room temperature The weight of the material is easy to flow; when the viscosity of the viscous material is more than 3,000 CPS, the non-contact spray coating can be intermittently actuated by the pneumatic valve in the pneumatically actuated dispenser. When the viscosity of the viscous material is more than 10,000 CPS, the above-mentioned pneumatic actuation method using the plunger as the extrusion is difficult to squeeze the viscous material to obtain a stable coating. Therefore, a screw is usually used as the extrusion member, mainly for dispensing. The screw is provided with a screw-like flange rotating in the direction of the rotating shaft, and the screw is rotated to solve the problem that the high-viscosity viscous material is not easily extruded.

In the development of integrated circuit miniaturization, it is known that if the flip chip technology assembly process needs to be applied with different adhesive materials, the chip designer will stipulate that all the electrical interconnection lines are packaged in the correct position using a certain target coating weight of the adhesive material. Too little viscous material can cause corrosion and cause excessive thermal stress. Too much viscous material can cause overflow and easily interfere with other components, so it is possible to apply precise weight of viscous material just right at the correct position. The quality of the packaging process has a great impact; In the prior art, non-contact spray coating and contact coating are the main technical subfields; wherein, the non-contact spray coating is used to make the viscous material fly out from the nozzle in a droplet state and eject the bullet to the object to be coated. When it is above, there will be an inertial scattering deviation. If the distance between the nozzle and the object to be coated is larger, the offset of the coating position is larger; the contact coating is a kind of contact before the viscous material leaves the extrusion port. The extrusion method of the coated article has a slight change in the horizontal position. When the adhesive material leaves the extrusion port of the extrusion device, the distance between the lowermost end portion of the instantaneous adhesive material and the surface of the object to be coated is almost zero, and the contact is continuous. The coating minimizes the offset of the coating position and effectively solves the problem of coating position shift.

The prior art has its requirements for the coating of high-viscosity viscous materials, but due to its high viscosity, it is very important to grasp the coating dose and coating speed. The coating of such high-viscosity viscous materials is Contact coating and screw is preferred as the extrusion, but how to control the target coating amount of a viscous material to perform a target coating stroke, which needs to be accurately and reliably controlled before mass production adjustment Each coating parameter is a subject to be studied.

Accordingly, it is an object of the present invention to provide a viscous material coating and aligning method for performing a verification target coating stroke coating data under the target coating weight requirement of a viscous material.

Another object of the present invention is to provide a viscous material coating and aligning method for confirming whether a displacement speed of an extrusion device for performing a target coating stroke is feasible under the target coating amount of a viscous material.

A further object of the present invention is to provide a viscous material coating and aligning method which can solve the problem that the coating is applied along the coating path with a certain target coating weight without excessive or insufficient adhesive material supply.

Still another object of the present invention is to provide a viscous material coating and aligning method for obtaining a displacement speed of an extrusion device in a case where the viscous material is prevented from being wasted.

Still another object of the present invention is to provide a viscous material coating aligning method for pre-programming a majority of control data to detect whether or not coating is applied along the target coating stroke during the coating time.

Still another object of the present invention is to provide an apparatus for applying the viscous material coating and aligning method according to any one of claims 1 to 12.

The viscous material coating and aligning method according to the object of the present invention comprises: providing a stage on which a workpiece to be coated is placed; providing an extrusion device provided with a driving mechanism for rotating a screw and being supplied by a supplier The conveyed viscous material is extruded from a extrusion port of the extrusion device by a spiral flange; a control device is provided, coupled to the extrusion device and controlled for relative movement with the object to be coated on the stage; The target coated weight viscous material which is just coated with the target coating stroke along the coating path is adjusted according to the screw rotation speed set by the control device and the moving speed of the extrusion device, so that the extrusion device is coated on the stage to be coated. The coated path is applied to a simulated coater of non-stick material extrusion.

According to another object of the present invention, a viscous material coating and aligning method comprises: coating a viscous material with a target of exactly the target coating stroke, and driving the viscous during a control device to maintain an extrusion device coating process The material is fixed by the screw speed of the spiral flange extrusion, and the coating weight measurement of a weight measuring unit is used to obtain a target coating first time and the first displacement speed of the extrusion device, and the first displacement of the extrusion device Speed the coating path simulation program of the object to be coated, so that the extrusion device obtains the target of the actual displacement of the extrusion device for the second time without actually extruding the viscous material, and obtains the second time through the repeated simulation. After the second time is equal to the optimum value of the second displacement speed of the extrusion device at the first time, the extrusion device is caused to extrude the viscous material to perform the actual coating of the viscous material.

A viscous material coating adjustment method according to still another object of the present invention comprises: coating a weight viscous material with a target of exactly the target coating stroke, and driving the viscous during a control device to maintain an extrusion device coating process The material is fixed at a screw speed of the spiral flange extrusion, and a coating path simulation program of the object to be coated is performed at a first displacement speed of the extrusion device, so that the extrusion device does not actually extrude the adhesive material. In the case of obtaining the optimum second displacement velocity value through the repeated simulation, the extrusion device is then extruded into the viscous material to perform the actual coating of the viscous material.

The viscous material coating adjustment method according to another object of the present invention comprises: performing an application path simulation program of the object to be coated before extruding the extrusion device to perform the viscous material. The simulation program coats the weight viscous material with the target of exactly the target coating stroke, and drives the viscous material to be fixed by the screw speed of the spiral flange extrusion while the control device maintains an extrusion device coating process. The extrusion device is simulated at a first displacement speed of the extrusion device without actually extruding the viscous material, so that the extrusion device obtains an optimum second displacement velocity value via the reverse simulation.

A viscous material coating and aligning method according to still another object of the present invention comprises: providing a stage on which a workpiece to be coated is placed; providing an extrusion device provided with a driving mechanism for rotating a screw, and The viscous material conveyed by a supply is extruded from the extrusion port of one of the extrusion devices by a spiral flange; a control device is provided, coupled to the extrusion device and moved relative to the object to be coated on the stage Control; according to the pre-programmed information in the control device, the extrusion coating device performs a simulated coating on the object to be coated without actually extruding the viscous material according to a previously determined target coating weight to detect Whether the extrusion device is just coated along the coating path during the coating time.

A viscous material coating and aligning apparatus according to still another object of the present invention, comprising: a device using a viscous material coating aligning method according to any one of claims 1 to 12.

The viscous material coating adjustment method and device according to the embodiment of the present invention simulates a previously determined target coating weight according to a pre-programmed screw rotation speed, an extrusion device moving speed, and a target coating stroke information in the control device. Coating to detect whether the target coating stroke coating can be completed along the coating path during the coating time, without actually applying the viscous material of the predetermined coating pattern to the object to be coated, thereby reducing The waste of viscous materials, the loss of test products, and the best verification benefits.

1‧‧‧ stage

11‧‧‧Objects to be coated

2‧‧‧Extrusion device

21‧‧‧ drive mechanism

22‧‧‧ screw

221‧‧‧Flange

23‧‧‧Supplier

24‧‧‧Extruder

3‧‧‧Control device

31‧‧‧ Weight measuring unit

32‧‧‧Image measuring unit

33‧‧‧Location measuring unit

4‧‧‧Coating path

41‧‧‧Corner

42‧‧‧ Straight path

X‧‧‧target coating weight

S‧‧‧ target coating stroke

R‧‧‧Screw speed

V1‧‧‧Extrusion device first displacement speed

V2‧‧‧Extrusion device second displacement speed

△V‧‧‧ displacement velocity error value

T1‧‧‧ target coating first time

T2‧‧‧ target coating second time

The first figure is a schematic view of a screw type actuating dispenser in the embodiment of the present invention.

The second figure is a schematic diagram of the coating path and the target coating stroke in the embodiment of the present invention.

The third figure is a schematic diagram of the coating correction process in the embodiment of the present invention.

Referring to the first figure, the coating of the viscous material of the embodiment of the present invention is continuously coated by contact and a screw is used as the actuating extrusion. The viscosity of the viscous material is greater than 10,000 CPS, and the viscous material is for example Adhesive materials used in semiconductor package and flat panel display manufacturing, such as adhesives, fluxes, solder resists, sealants, silver pastes, resin adhesives, etc., can be implemented by using a dispenser as shown in the figure. The utility model comprises: a loading platform 1 for carrying the object 11 to be coated; an extrusion device 2 for extruding the viscous material to the object to be coated 11 on the loading platform; and an extrusion device 2 The screw 22 is rotated by the driving mechanism 21, and the viscous material conveyed by the supplier 23 is extruded from the extrusion device 2; the driving mechanism 21 includes a mechanism that can drive the screw 22 to rotate and shift up and down; the screw 22 is in the shape of a rod A spiral flange 221 having a proper pitch on the peripheral surface is driven to rotate by the driving mechanism 21 to extrude the viscous material toward the extrusion port 24 by the spiral flange 221; the viscous material required for the extrusion device 2 is squeezed The output can be controlled by the speed of the screw 22 And the viscosity of the adhesive material is changed from the supply pressure of the supply device 23; at the end of the extrusion, the rotation of the screw 22 is stopped by stopping the rotational driving of the drive mechanism 21, and by stopping the supply 23 The extrusion device 11 supplies the pressure-sensitive adhesive material, and under the driving mechanism 21 drives the screw 22 to be displaced downward, the front end of the screw 22 closes the extrusion port 24 to cut the extrusion of the viscous material; the extrusion device 2 The distance between the extrusion port 24 and the surface of the object to be coated 11 is set to be less than 1 mm; the relative moving speed of the extrusion device 2 and the object to be coated 11 is 1 to 100 mm/s.

A control device 3 is coupled to the extrusion device 2 and controls the relative movement of the object 11 to be coated on the stage 1; it also controls a weight measuring unit 31, an image measuring unit 32, and a position measuring unit. The function of 33 is performed; the weight measuring unit 31 is connected to the control device and provides a feedback signal in a manner of weighing the weight of the viscous material weighed by the weighing scale on the surface of the object to be coated. Comparing with a previously determined target coating weight; the image measuring unit 32 is coupled to the control device and provides a feedback signal by comparing the coating pattern applied to the surface of the object to be coated The image obtained by the CCD is compared with a previously determined target coating pattern; the position measuring unit 33 is connected to the control device and provides a feedback signal in a manner that the comparison is applied by the representative to the The absolute position coordinate of the extrusion port of the extrusion device at the end position on the surface of the coated article is compared with a previously determined target coating stroke end point; the control device 3 can be built Any electrical control means is a plurality of control inputs, each independently of the control units or components.

For the contact type, please refer to the second and third figures. In the method for coating and adjusting the adhesive material in the embodiment of the present invention, the control, adjustment and correction of each parameter are performed by the "target coating weight X" viscous material. The stroke S" coating path 4 serves as a reference for the adjustment; in addition, in the embodiment of the present invention, the "screw speed R" fixed during the coating process is also a calibration reference to be considered; an optimum "screw speed R" The viscosity of the coated adhesive material can be changed by changing the "screw speed R" by referring to the control device 3, and the weight of the coated adhesive material can be changed. The size of the viscous material; and the viscous material coating pattern can be determined by controlling the "screw speed R", the screw 22 is designed such as the pitch size, the thread pitch and the distance between the front end of the screw 22 and the extrusion port 24 and the viscosity. The viscosity of the material also affects the size of the extruded viscous material, but since the above-mentioned causes are already a fixed value when the extrusion device 2 is designed, the embodiment of the present invention adjusts the viscous material coating. The general will no longer consider.

After the "target coating weight X" and the "screw speed R" are set by the control device, it is necessary to obtain a "target coating first time T1" by the "weight measurement unit 31 coating weight measurement"; The measurement of the coating weight of the unit 31 can be performed by using a measuring instrument such as a scale, and the extrusion device 2 calculates the "target coating weight X" by the time of extruding a predetermined viscous material by the "screw speed R". The target coating first time T1 required for the coating path 4 of the "target coating stroke S" is completed, and the "target coating stroke S" is obtained by dividing the "target coating first time T1". The first displacement speed V1" of the extrusion device can obtain an optimum value via the "coating weight measurement of the weight measuring unit 31" which is repeated a plurality of times.

After obtaining the "target coating first time T1" and the "extrusion device first displacement speed V1", a "coating path simulation of the object to be coated" program is performed using the "first displacement speed V1 of the extrusion device" This procedure will cause the extrusion device 2 to set the "target coating weight X", "screw speed R" and the obtained "first displacement speed of the extrusion device" without actually extruding the viscous material. V1" performs a "target coating stroke S" coating path 4 simulation displacement to obtain a "target coating second time T2" of the actual displacement of the extrusion device 2, the T2 value of the extrusion device 2 completes the coating path 4 The time of the "target coating stroke S"; the T2 value may be different from the "target coating first time T1" due to the mechanism factor or other variables, and the first displacement of the extrusion device may be adjusted repeatedly by repeated Speed V1" and "simulation of the coating path of the object to be coated" until the optimum value of T2 = T1 is obtained, and the "second displacement speed V2 of the extrusion device" obtained at this time will be the same as the "extrusion device" A displacement velocity V1" is different, and is formed as V2 = V1 + ΔV (displacement speed Degree error value); the "coating path simulation of the object to be coated" can be simulated by the extrusion device 2 according to the coating path 4, and can also perform simulation such as "screw speed R" or other data adjustment; The coating path 4 may include a straight path 42 or a corner portion 41. During the extrusion process of the viscous material in the extrusion device 2, the linear path 42 is continuously coated by the moving inertia to maintain the coating pattern of the viscous material. It is constant, and the corner portion 41 will be controlled by the movement speed of the extrusion device 2, which is relatively movable at a certain variable speed, which must be made after entering the corner portion 41 and before reaching the end point of the corner portion 41. The moving speed of the extrusion device 2 is shifted by the arc angle of the corner portion 41; in the "coating path simulation of the object to be coated", the "target coating second time T2" refers to the "target coating" of the completion coating path 4. At the time of the stroke S", regardless of the number of linear paths 42 or the corner portion 41 strokes in the "target coating stroke S", the total time in all the coating paths 4 of the "target coating stroke S" is taken as "Target coated second time T2".

After the "coating path simulation of the object to be coated" is completed and the T2=T1 value is obtained, the extrusion device 2 is caused to execute the "actual coating of the viscous material" to cause the extrusion device 2 to extrude the viscous material, and Under the "target coating weight X" and "screw speed R" settings, the "adhesive material actual coating" is executed according to the obtained "extrusion device second displacement speed V2", and the target coating result is repeated and executed. The detection may include: correcting the absolute position coordinates of the extrusion port 24 of the extrusion device 2 by the position measuring unit 33, and providing a feedback signal in a manner of comparing the absolute position coordinates of the extrusion port 24 of the extrusion device 2. , which represents the end position on the surface of the workpiece coated on the substrate, is compared with a previously determined target coating stroke 4 end point, and based on the measurement result, the lead time and the "second displacement speed of the extrusion device" are performed. The adjustment of V2"; wherein the lead time is a compensation value for triggering the rotation of the screw 22, since the adhesive material starts to be applied differently from the starting point of the extrusion device 2 reaching the coating path 4, the control design is to compensate the viscosity Material In the falling object to be coated before the horizontal displacement of the inertial 11, just make the adhesive material coated on the coating path and the starting point 4 The coating pattern is kept constant; the above detection may further include: correcting the coating pattern by the image measuring unit 32, thereby adjusting the flow characteristics of the viscous material.

Completion of "actual coating of viscous material" and repeated execution and "target coating result detection" to obtain the "target coating weight X" viscous material just to complete the "target coating stroke S" coating path 4 is the best" After the second displacement speed V2" of the extrusion device, the operation of applying the coating of the viscous material can be performed for mass production coating; if the target coating weight, coating pattern, coating path 4 or If the viscosity of the viscous material changes, the coating parameter calibration should be re-executed to obtain a new screw 22 rotation speed, extrusion device 2 moving speed, lead time, coating time and coating path 4 information.

The viscous material coating adjustment method and device according to the embodiment of the present invention, according to the pre-programmed screw 22 rotation speed, the extrusion device 2 moving speed, and the target coating stroke information in the control device, the coating weight is applied to a previously determined target. Simulating the coating to detect whether the target coating stroke coating can be completed along the coating path 4 within the coating time without actually applying the viscous material of the predetermined coating pattern to the object to be coated 11, Thereby, the waste of the viscous material and the loss of the test product can be reduced, and the best verification benefit can be obtained.

The above is only the preferred embodiment of the present invention, and the scope of the invention is not limited thereto, that is, the simple equivalent changes and modifications made by the scope of the invention and the description of the invention are All remain within the scope of the invention patent.

X‧‧‧target coating weight

R‧‧‧Screw speed

V1‧‧‧Extrusion device first displacement speed

V2‧‧‧Extrusion device second displacement speed

T1‧‧‧ target coating first time

T2‧‧‧ target coating second time

Claims (13)

A method for coating and adjusting a viscous material, comprising: providing a stage on which a workpiece to be coated is placed; providing an extrusion device, providing a driving mechanism to rotate a screw, and conveying the viscosity by a supplier The material is extruded from the extrusion port of one of the extrusion devices by a spiral flange; a control device is provided, coupled to the extrusion device and controlled for relative movement with the article to be coated on the stage; The path just completes the target coating weight of the viscous material coated by the target coating stroke, and according to the screw rotation speed set by the control device and the moving speed of the extrusion device, the workpiece to be coated on the loading table is implemented according to the coating path. Simulated applicator for the extrusion of non-stick materials. A method for coating and adjusting a viscous material, comprising: coating a weight viscous material with a target of exactly the target coating stroke, and driving the viscous material to a spiral flange during a control device to maintain an extrusion device coating process Under the fixed screw speed of the extrusion, the coating weight measurement of a weight measuring unit is used to obtain a target coating first time and the first displacement speed of the extrusion device, and the first displacement speed of the extrusion device is to be coated. The coating path simulation program of the object enables the extrusion device to obtain the target of the actual displacement of the extrusion device for the second time without actually extruding the viscous material, and obtain the second time equal to the first time by the repeated simulation. After the second displacement speed of the extrusion device is optimal, the extrusion device is extruded from the viscous material to perform the actual coating of the viscous material. A method for coating and adjusting a viscous material, comprising: coating a weight viscous material with a target of exactly the target coating stroke, and driving the viscous material to a spiral flange during a control device to maintain an extrusion device coating process After the extrusion screw speed is fixed, a coating path simulation process of the object to be coated is performed at a first displacement speed of the extrusion device. In order to enable the extrusion device to obtain the optimal second displacement velocity value through repeated simulation without actually extruding the viscous material, the extrusion device is then extruded into the viscous material to perform the actual coating of the viscous material. A method for coating and adjusting a viscous material, comprising: before an extrusion device extrudes a viscous material to perform an actual coating of the viscous material, first performing a coating path simulation program of the object to be coated, the simulation program is just Complete the target coating stroke target coating weight viscous material, and drive the viscous material to a screw flange extrusion screw speed while a control device keeps an extrusion device coating process, so that the extrusion device is not In the case of actually extruding the viscous material, the simulation is performed at a first displacement speed of the extrusion device, so that the extrusion device obtains the optimum second displacement velocity value via the reverse simulation. A method for coating and adjusting a viscous material, comprising: providing a stage on which a workpiece to be coated is placed; providing an extrusion device, providing a driving mechanism to rotate a screw, and conveying the viscosity by a supplier The material is extruded from the extrusion port of one of the extrusion devices by a spiral flange; a control device is provided, coupled to the extrusion device and controlled for relative movement of the object to be coated on the stage; Stylized information, with a previously determined target coating weight, the extrusion device performs a simulated coating on the object to be coated without actually extruding the viscous material to detect the extrusion device during the coating time Whether the coating is completed just along the coating path. The viscous material coating adjustment method according to any one of claims 1 to 5, wherein a weight measuring unit is connected to the control device and provides a feedback signal, which is corrected by a representative The weight of the viscous material weighed on the surface of the article to be coated, weighed by a weighing scale, is compared to a previously determined target coating weight. The viscous material coating adjustment method according to any one of claims 1 to 5, wherein an image measuring unit is connected to the control device, and a feedback signal is provided, which is corrected The method is: comparing the image obtained by the CCD which is applied to the coating pattern applied to the surface of the object to be coated, and comparing with a previously determined target coating pattern. The viscous material coating adjustment method according to any one of claims 1 to 5, wherein a position measuring unit is connected to the control device, and a feedback signal is provided, wherein the correction method is: The absolute position coordinates of the extrusion port of the extrusion device applied to the end position on the surface of the object to be coated are compared with a previously determined target coating stroke end point. The viscous material coating adjustment method according to any one of claims 1 to 5, wherein the target coating stroke of the extrusion device comprises a portion in which the moving speed is relatively moved at a certain speed. The viscous material coating adjustment method according to any one of claims 1 to 5, wherein a distance between the extrusion port of the extrusion device and the surface of the object to be coated is set to be 1 mm or less. The viscous material coating adjustment method according to any one of claims 1 to 5, wherein the relative moving speed of the extrusion device and the object to be coated is 1 to 100 mm/s. The viscous material coating and aligning method according to any one of claims 1 to 5, wherein the viscous material is a viscous material extruded by a dispenser in a semiconductor package or a flat panel display manufacturing. Such as adhesives, fluxes, solder resists, sealants, silver pastes, resin adhesives, and the like. A viscous material coating aligning apparatus comprising the apparatus for applying a viscous material coating aligning method according to any one of claims 1 to 12.