WO2001047657A1 - Bohrdecklage aus oder im wesentlichen aus einer metallfolie - Google Patents
Bohrdecklage aus oder im wesentlichen aus einer metallfolie Download PDFInfo
- Publication number
- WO2001047657A1 WO2001047657A1 PCT/EP2000/013287 EP0013287W WO0147657A1 WO 2001047657 A1 WO2001047657 A1 WO 2001047657A1 EP 0013287 W EP0013287 W EP 0013287W WO 0147657 A1 WO0147657 A1 WO 0147657A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- metal foil
- microtopography
- cover layer
- drill
- drilling
- 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
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/0011—Working of insulating substrates or insulating layers
- H05K3/0044—Mechanical working of the substrate, e.g. drilling or punching
- H05K3/0047—Drilling of holes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B35/00—Methods for boring or drilling, or for working essentially requiring the use of boring or drilling machines; Use of auxiliary equipment in connection with such methods
- B23B35/005—Measures for preventing splittering
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B41/00—Boring or drilling machines or devices specially adapted for particular work; Accessories specially adapted therefor
- B23B41/14—Boring or drilling machines or devices specially adapted for particular work; Accessories specially adapted therefor for very small holes
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
- H05K2203/01—Tools for processing; Objects used during processing
- H05K2203/0147—Carriers and holders
- H05K2203/0152—Temporary metallic carrier, e.g. for transferring material
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
- H05K2203/02—Details related to mechanical or acoustic processing, e.g. drilling, punching, cutting, using ultrasound
- H05K2203/0214—Back-up or entry material, e.g. for mechanical drilling
Definitions
- Drill cover layer made of or essentially from a metal foil
- the invention relates to a drill cover layer made of or essentially made of a metal foil for mechanical drilling of microfine holes, in particular in printed circuit board manufacture.
- drilling cover layers serve to reduce the burr and the course of the drill, to avoid pressure marks on the part of a hold-down device and to keep the cutting edges and spiral grooves of the drill clean.
- Known drilling cover layers of the type specified at the outset have the disadvantage that the drill (mechanical drills are now used down to a diameter of 0.1 mm) runs easily. This is due to the fact that the surface of the drill cover layer in question is either relatively smooth or has an irregular structure.
- the metal foils in question are regularly rolled, which in the rolling direction leads to a fairly uniform, but transversely to the rolling direction leads to an irregularly grooved microtopography.
- the invention is therefore based on the object of creating a well-proven drill cover layer made of a metal foil, in which even the finest mechanical drills largely do not run.
- the drill cover layer has an essentially direction-independent on at least one of its surfaces. ge microtopography with a roughness depth between 1 and 5 microns. This direction - independent and somewhat regular microtopography means that the drill has a maximum length of half the pitch of the elevations or the microtopography. Depressions can run.
- Claims 2-6 indicate advantageous configuration options for the relevant drilling cover layer, while claims 7 and 8 are directed to methods for producing the relevant microtopography.
- Fig. 1 is a greatly enlarged plan view of a section of an ideal drill hole layer according to the invention.
- Fig. 2 shows a greatly enlarged cross section through a drill cover layer according to the invention in a practical embodiment.
- the microtopography of a drill cover layer 2 ideally shows a pattern of immediately adjacent pyramids 4 of equal size with a base in the form of a regular polygon - here in the form of an equilateral triangle.
- a drill tip hitting it provided that it is only small enough to penetrate between pyramids which are adjacent to one another, is guided in the shortest possible way into the next recess 6 located in between.
- the largest possible aberration is therefore approximately half the tip spacing of the pyramids 4.
- a metal foil 8 which has on one surface a microtopography 10 consisting of more or less pyramidal, conical or dome-shaped elevations 12 that are essentially regular on all sides with recesses 14 in between ,
- the roughness is 16, d. H . the height of the elevations 12 relative to the depressions 14, between 1 and 5 ⁇ m, preferably between 2 and 4 ⁇ m and most suitably about 3 ⁇ m.
- Wells 14 in the microtopography 10 will be approximately 1 to 2 times the roughness depth 16.
- the drill guide Due to the reduced aberration during drilling with a drill cover layer according to the invention, the drill guide also improves overall, i. g. the holes are drilled with greater precision, since the drill only experiences a very slight bend at most. It is therefore generally possible to drill several layers of material lying on top of one another using a drill cover layer according to the invention and thus to increase productivity. On the other hand, multilayer circuit boards can be drilled with pinpoint accuracy using the smallest drill bits.
- the drill cover layer 2 consists of an aluminum alloy, most suitably an aluminum-magnesium or aluminum-manganese alloy, which, while having a low hardness and good machinability in relation to the drill wear, nevertheless has the required drill guide properties and, in addition, the preparation of long chips prevented on the drill.
- the microtopography 10 can be manufactured in various ways. This means that the relevant tall film find a correspondingly structured roller surface.
- the microstructure 4 can subsequently be produced by embossing, sandblasting - most suitably using pumice flour ("pumice”) -, micro-etching, electropolishing or the like. Appropriate processes are familiar to the metalworking specialist.
- the metal foil 8 expediently has a thickness between 0.05 and 0.6 mm, preferably between 0.1 and 0.4 mm and most preferably about 0.2 mm.
- the metal foil 8 of a drill cover layer 2 according to the invention can, however, as indicated by dashed lines in FIG. 2, if desired on a further foil 20 made of softer material, such as e.g. a polyethylene, to be laminated in order to avoid printing marks on the part of a hold-down device with even greater reliability.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP00991271A EP1244532A1 (de) | 1999-12-28 | 2000-12-27 | Bohrdecklage aus oder im wesentlichen aus einer metallfolie |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1999163452 DE19963452A1 (de) | 1999-12-28 | 1999-12-28 | Bohrdecklage aus oder im wesentlichen aus einer Metallfolie |
| DE19963452.1 | 1999-12-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2001047657A1 true WO2001047657A1 (de) | 2001-07-05 |
Family
ID=7934795
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2000/013287 Ceased WO2001047657A1 (de) | 1999-12-28 | 2000-12-27 | Bohrdecklage aus oder im wesentlichen aus einer metallfolie |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1244532A1 (de) |
| DE (1) | DE19963452A1 (de) |
| WO (1) | WO2001047657A1 (de) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7914898B2 (en) * | 2003-12-09 | 2011-03-29 | Kabushiki Kaisha Kobe Seiko Sho | Resin-coated metal plate for use in perforating printed-wiring board |
| CN103056918A (zh) * | 2012-12-21 | 2013-04-24 | 深圳市柳鑫实业有限公司 | 一种用于提高钻孔孔位精确度的铝片及制造方法 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60155307A (ja) * | 1984-01-20 | 1985-08-15 | Fujitsu Ltd | プリント板の孔明方法 |
| EP0804055A2 (de) * | 1996-02-08 | 1997-10-29 | Showa Aluminum Corporation | Eintrittsplatte zum Bohren von kleinen Löchern, Verfahren zu ihrer Herstellung und Verfahren zum Bohren von kleinen Löchern durch eine Leiterplatte unter Verwendung dieser Eintrittsplatte |
-
1999
- 1999-12-28 DE DE1999163452 patent/DE19963452A1/de not_active Withdrawn
-
2000
- 2000-12-27 EP EP00991271A patent/EP1244532A1/de not_active Withdrawn
- 2000-12-27 WO PCT/EP2000/013287 patent/WO2001047657A1/de not_active Ceased
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60155307A (ja) * | 1984-01-20 | 1985-08-15 | Fujitsu Ltd | プリント板の孔明方法 |
| EP0804055A2 (de) * | 1996-02-08 | 1997-10-29 | Showa Aluminum Corporation | Eintrittsplatte zum Bohren von kleinen Löchern, Verfahren zu ihrer Herstellung und Verfahren zum Bohren von kleinen Löchern durch eine Leiterplatte unter Verwendung dieser Eintrittsplatte |
Non-Patent Citations (1)
| Title |
|---|
| PATENT ABSTRACTS OF JAPAN vol. 009, no. 322 (M - 440) 18 December 1985 (1985-12-18) * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7914898B2 (en) * | 2003-12-09 | 2011-03-29 | Kabushiki Kaisha Kobe Seiko Sho | Resin-coated metal plate for use in perforating printed-wiring board |
| CN103056918A (zh) * | 2012-12-21 | 2013-04-24 | 深圳市柳鑫实业有限公司 | 一种用于提高钻孔孔位精确度的铝片及制造方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| DE19963452A1 (de) | 2001-07-19 |
| EP1244532A1 (de) | 2002-10-02 |
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