WO1998021781A1 - Fluid mit mehreren, eine elektrisch leitfähige oberfläche aufweisenden partikeln - Google Patents
Fluid mit mehreren, eine elektrisch leitfähige oberfläche aufweisenden partikeln Download PDFInfo
- Publication number
- WO1998021781A1 WO1998021781A1 PCT/EP1997/006176 EP9706176W WO9821781A1 WO 1998021781 A1 WO1998021781 A1 WO 1998021781A1 EP 9706176 W EP9706176 W EP 9706176W WO 9821781 A1 WO9821781 A1 WO 9821781A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- particles
- fluid
- conductor tracks
- electrical conductors
- fluid according
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/04—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation using electrically conductive adhesives
Definitions
- Fluid with several particles having an electrically conductive surface having an electrically conductive surface
- the invention relates to a fluid with a plurality of particles having an electrically conductive surface and with an electrically non-conductive medium surrounding the particles for contacting two mutually opposite electrical conductors, each arranged on an electrode carrier.
- a liquid crystal display as an electrode carrier has two opposing glass plates which are provided with conductor tracks designed as electrical conductors. The conductor tracks are contacted with one another by means of the particles of the fluid. This gives a liquid crystal display which can be connected to control electronics, for example, on one of the glass plates.
- a paste with silver particles is often used as the fluid, which is applied to the conductor tracks of the one glass plate by means of screen printing. After merging intersecting conductor tracks of the glass plates of the two glass plates are contacted with each other.
- the silver paste should be applied over a particularly small area to avoid short-circuits between two adjacent conductor tracks. This requires particularly precise work when screen printing and when assembling the glass plates.
- spacers are to be arranged between the glass plates, which prevent the paste from running when the glass plates are pressed, and thus prevent an electrically conductive connection between two adjacent conductor tracks. This fluid is therefore only suitable for electrode carriers whose conductor tracks are very far apart.
- a fluid which contains gold balls, each of which has an intended diameter. These gold balls contact two mutually opposite conductor tracks and at the same time ensure that the glass plates are spaced apart from one another.
- the quantity ratio of the gold balls to the rest of the fluid is so small that the gold balls do not touch one another.
- the fluid is anisotropically conductive, so that it only conducts the electrical current across its greatest extent. The fluid can therefore also be applied via adjacent conductor tracks without causing a short circuit. Compared to silver paste, this means that the fluid does not have to be applied particularly precisely.
- the known fluids have the disadvantage that the electrical conductors must first be cleaned thoroughly.
- the conductor tracks of a liquid crystal display are generally completely covered with an electrically non-conductive orientation layer. If the orientation layer is removed, there is also a risk of damage to the conductor tracks.
- the invention is based on the problem of designing a fluid of the type mentioned at the outset in such a way that mutually opposite electrical conductors of two electrode carriers are reliably contacted with one another without the conductors having to be cleaned particularly thoroughly.
- This design means that the electrical conductors do not have to be cleaned or only loose dirt is removed before the fluid is applied.
- An insulating lacquer or orientation layer adhering to the conductors is penetrated by the edges or tips of the particles when the electrode carriers are pressed. The particles are therefore reliably contacted by the particles.
- the quantitative ratio of the particles to the rest of the fluid can optionally be dimensioned such that the fluid conducts the electrical current in any direction or an anisotropically conductive fluid is produced.
- an anisotropically conductive fluid this can be applied by any method without connecting conductors arranged next to one another in an electrically conductive manner. For this reason, the fluid can be applied inexpensively to one of the electrode carriers using centrifugal technology, for example.
- the centrifugal technology is characterized by a high and uniform particle contamination and also enables a high application speed.
- the particles can have approximately the same size as the gold balls of the known fluid. As a result, the use of spacers to be arranged separately is not necessary.
- the particles can be produced particularly inexpensively if the particles are coated with glass fiber cuts are.
- the fiber optic sections Thanks to their hardness, they also have the advantage of scratching the electrical conductors and thus ensuring reliable contacting.
- the particles have a high conductivity if they have a surface of silver or gold.
- the surface can be created either by coating the particles or by solidly designing the particles from gold or silver.
- a short circuit of two adjacent electrical conductors can be reliably avoided if the particles are smaller than the lateral distances between the electrical conductors.
- the short circuit of two adjacent electrical conductors is particularly reliably avoided if the particles are smaller by a factor of 5 to 10 than the lateral distances between the electrical conductors.
- the electrode carriers could be fixed in their position by means of an additional adhesive to be applied and sealed against the ingress of moisture. According to another advantageous development, such an adhesive can be avoided if the medium surrounding the particles is chemically curing.
- the invention permits numerous embodiments. To further clarify its basic principle, one of these is shown in the drawing and is described below. In a single figure, this shows a sectional view through an outer region of a liquid crystal display.
- the liquid crystal display has two mutually opposite, glass plate-shaped electrode supports 1, 2 with conductor tracks 3-5 arranged thereon.
- the conductor tracks 3-5 are each covered with an electrically insulating orientation layer 6, 7.
- a liquid crystal material 8 is enclosed in a space between the orientation layers.
- a polarizer 9, 10 and, in addition, a reflector 11 are additionally applied to both sides of the liquid crystal display.
- the liquid crystal material 8 changes its light transmission when an electrical voltage is applied to the conductor tracks 3-5.
- the electrode carriers 1, 2 are laterally glued with a fluid 12 which seals the liquid crystal material 8 to the outside.
- the fluid 12 contains a chemically curing, electrically non-conductive medium 13 with polygonal particles 14 arranged therein, which have a surface made of a conductive material. These particles 14 penetrate the orientation layers 6, 7 and contact mutually opposite conductor tracks 3, 4 of the electrode carriers 1, 2.
- the quantitative ratio of the particles 14 to the medium 13 is so low that the particles 14 do not touch one another.
- the fluid 12 is anisotropically conductive.
Landscapes
- Liquid Crystal (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP97950135A EP0937315B1 (de) | 1996-11-11 | 1997-11-06 | Fluid mit mehreren, eine elektrisch leitfähige oberfläche aufweisenden partikeln |
| DE59704552T DE59704552D1 (de) | 1996-11-11 | 1997-11-06 | Fluid mit mehreren, eine elektrisch leitfähige oberfläche aufweisenden partikeln |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19646287.8 | 1996-11-11 | ||
| DE19646287A DE19646287A1 (de) | 1996-11-11 | 1996-11-11 | Fluid mit mehreren, eine elektrisch leitfähige Oberfläche aufweisenden Partikeln |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1998021781A1 true WO1998021781A1 (de) | 1998-05-22 |
Family
ID=7811148
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP1997/006176 Ceased WO1998021781A1 (de) | 1996-11-11 | 1997-11-06 | Fluid mit mehreren, eine elektrisch leitfähige oberfläche aufweisenden partikeln |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0937315B1 (de) |
| DE (2) | DE19646287A1 (de) |
| WO (1) | WO1998021781A1 (de) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2350853A1 (en) * | 2001-06-15 | 2002-12-15 | Groupe Minutia Inc. | Method of establishing electrical conductivity between oxide-coated electrical conductors |
| US7034403B2 (en) | 2003-04-10 | 2006-04-25 | 3M Innovative Properties Company | Durable electronic assembly with conductive adhesive |
| US7695804B2 (en) | 2003-04-10 | 2010-04-13 | 3M Innovative Properties Company | Heat-activatable adhesive |
| DE102016203386B4 (de) * | 2015-03-02 | 2021-03-04 | Brose Fahrzeugteile SE & Co. Kommanditgesellschaft, Würzburg | Kommutatormotor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62217694A (ja) * | 1986-03-18 | 1987-09-25 | ダイソー株式会社 | 回路の接続方法 |
| EP0265212A1 (de) * | 1986-10-18 | 1988-04-27 | Japan Synthetic Rubber Co., Ltd. | Elektrisch leitende Partikel und diese enthaltender Klebstoff |
| DE4138779A1 (de) * | 1991-11-26 | 1993-07-29 | Lcd Mikroelektronik Dr Hampel | Methode zur kontaktierung elektronischer bauelemente |
| EP0562569A2 (de) * | 1992-03-25 | 1993-09-29 | Molex Incorporated | Anisotropisches Klebemittel zum Verbinden eines elektronischen Bauelementes mit einem gedruckten Schaltungsmodul |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT307522B (de) * | 1970-12-21 | 1973-05-25 | Electrovac | Flüssigkristallzelle und Verfahren zu deren Herstellung |
| JPS5229754A (en) * | 1975-09-01 | 1977-03-05 | Mitsubishi Electric Corp | Image display sealing method |
| JPS52141249A (en) * | 1976-05-20 | 1977-11-25 | Seiko Epson Corp | Spacer for display panel |
| JPS5770522A (en) * | 1980-10-20 | 1982-05-01 | Matsushita Electric Ind Co Ltd | Liquid crystal display panel |
-
1996
- 1996-11-11 DE DE19646287A patent/DE19646287A1/de not_active Withdrawn
-
1997
- 1997-11-06 WO PCT/EP1997/006176 patent/WO1998021781A1/de not_active Ceased
- 1997-11-06 DE DE59704552T patent/DE59704552D1/de not_active Expired - Lifetime
- 1997-11-06 EP EP97950135A patent/EP0937315B1/de not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62217694A (ja) * | 1986-03-18 | 1987-09-25 | ダイソー株式会社 | 回路の接続方法 |
| EP0265212A1 (de) * | 1986-10-18 | 1988-04-27 | Japan Synthetic Rubber Co., Ltd. | Elektrisch leitende Partikel und diese enthaltender Klebstoff |
| DE4138779A1 (de) * | 1991-11-26 | 1993-07-29 | Lcd Mikroelektronik Dr Hampel | Methode zur kontaktierung elektronischer bauelemente |
| EP0562569A2 (de) * | 1992-03-25 | 1993-09-29 | Molex Incorporated | Anisotropisches Klebemittel zum Verbinden eines elektronischen Bauelementes mit einem gedruckten Schaltungsmodul |
Non-Patent Citations (1)
| Title |
|---|
| DATABASE WPI Section Ch Week 8744, Derwent World Patents Index; Class A18, AN 87-309789, XP002060470 * |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0937315B1 (de) | 2001-09-05 |
| EP0937315A1 (de) | 1999-08-25 |
| DE19646287A1 (de) | 1998-05-14 |
| DE59704552D1 (de) | 2001-10-11 |
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