EP0303485A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
An improved circuit board
Assignee: Balfour Beatty PLC
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Filing: 1988-08-11
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Granted: —
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Expires: 2008-08-11
Abstract
Abstract A circuit board in which the patterns of electrically conductive strips and/or pads can be of either standard or non-standard form and which can be designed and assembled by a user comprises a rigid electrically insulating board 1 having a multiplicity of holes 2 through the board arranged in a pattern of rows and columns and, secured to one major surface of the board, a separately formed flexible sheet 4 of electrically insulating material carrying on the surface of the sheet remote from the board a pattern of electrically conductive strips and/or pads 8 which overlies holes in the board. The strips and/or pads 8 are of such an electrically conductive material and of such a thickness that, when a pin C is urged through an electrically conductive strip or pad and the underlying flexible sheet 4 into an underlying hole 2 in the board, electrically conductive material pierced by the pin will effect an electrical contact with the pin passing through the material.
Inventors
- 👤 Howard Lawrence
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 04:16
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/40; H05K3/4038; H05K3/4046; H05K3/0058; H05K3/0064; H05K3/30; H05K3/32; H05K3/325; H05K3/326; H05K1/00; H05K1/02; H05K1/11; H05K1/118; H05K2201/00; H05K2201/09; H05K2201/09009; H05K2201/091; H05K2201/09209; H05K2201/095; H05K2201/09609; H05K2201/10; H05K2201/10227; H05K2201/10295; H05K2201/10303; H05K2201/10431; H05K2201/1059; H05K2201/20; H05K2201/2009; H05K3/306; H05K3/46; H05K3/4611
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
152 words
A circuit board comprising a substantially rigid board (1,11) of which at least the major surfaces are of electrically insulating material and which has extending through the rigid board a multiplicity of holes (2,12) arranged in a pattern of rows and columns and, secured to one major surface of the rigid board, a separately formed flexible sheet (4,14) of electrically insulating material which carries on the surface of the flexible sheet remote from the rigid board a pattern of electrically conductive strips and/or pads (8,18) which overlies holes in the rigid board, the strips and/or pads being of such an electrically conductive material and of such a thickness that, when a pin (C) is urged through an electrically conductive strip or pad and the underlying flexible sheet into an underlying hole in the rigid board, electrically conductive material pierced by the pin will effect an electrical contact with the pin passing therethrough.
Claim 2
Dependent Claim
152 words
A circuit board comprising a substantially rigid board (1,11) of which at least the major surfaces are of electrically insulating material and which has extending through the rigid board a multiplicity of holes (2,12) arranged in a pattern of rows and columns and, secured to one major surface of the rigid board, a separately formed flexible sheet (4,14) of electrically insulating material which carries on the surface of the flexible sheet remote from the rigid board a pattern of electrically conductive strips and/or pads (8,18) which overlies holes in the rigid board, the strips and/or pads being of such an electrically conductive material and of such a thickness that, when a pin (C) is urged through an electrically conductive strip or pad and the underlying flexible sheet into an underlying hole in the rigid board, electrically conductive material pierced by the pin will effect an electrical contact with the pin passing therethrough.
Claim 3
Dependent Claim
94 words
A circuit board as claimed in Claim 1, wherein one major surface of the rigid board (11) has secured thereto a laminate of two or more sheets (14) of electrically insulating material, each of which flexible sheets - except the flexible sheet immediately adjacent and secured to the rigid board - is secured to the underlying flexible sheet and each of which flexible sheets carries on the surface of the flexible sheet remote from the rigid board a pattern of electrically conductive strips and/or pads (18) which overlies holes (12) in the rigid board.
Claim 4
Dependent Claim
65 words
A circuit board as claimed in Claim 1 or 2, wherein the other major surface of the rigid board (11) has secured thereto at least one separately formed flexible sheet (14) of electrically insulating material which carries on the surface of the flexible sheet nearer the rigid board a pattern of electrically conductive strips and/or pads (18) which overlies holes (12) in the rigid board.
Claim 5
Dependent Claim
69 words
A circuit board as claimed in any one of the preceding Claims, wherein the flexible sheet (4,14) is secured to said major surface of the rigid board (1,11) - and in a laminate of two or more flexible sheets the flexible sheet is secured to an underlying flexible sheet - by means of double-sided self-adhesive tape (6,16) of electrically insulating material in which the adhesive is a non-setting adhesive.
Claim 6
Dependent Claim
79 words
A circuit board as claimed in any one of the preceding Claims, wherein the or each flexible sheet (4,14) is made of electrically insulating plastics material having such inherent elasticity that, when an electrically conductive strip or pad (8,18) and the underlying flexible sheet are pierced by a pin (C), the inherent elasticity of the plastics material of the sheet tends to urge the electrically conductive material of the pierced strip or pad into electrical contact with the pin.
Claim 7
Dependent Claim
100 words
A kit of parts for use in the assembly of a circuit board as claimed in any one of the preceding Claims, which kit of parts comprises at least one substantially rigid board (1) of which at least the major surfaces are of electrically insulating material and which has extending through the rigid board a multiplicity of holes (2) arranged in a pattern of rows and columns; at least one separately formed flexible sheet (4) of electrically insulating material; and means (6) for securing a flexible sheet to a surface of the rigid board or to an underlying flexible sheet.
Claim 8
Dependent Claim
47 words
A kit of parts as claimed in Claim 6, wherein the means for securing a flexible sheet to a surface of the rigid board or to an underlying flexible sheet is double-sided self-adhesive tape (6) of electrically insulating material in which the adhesive is a non-setting adhesive.
Claim 9
Dependent Claim
100 words
A kit of parts as claimed in Claim 6 or 7, which kit of parts also includes any one or more of pin-insertion equipment, at least one punching pin, a block of cellular plastics material having a pair of opposed major surfaces lying in substantially parallel planes or at least one substantially rigid backing board having extending through the board a multiplicity of holes arranged in a pattern of rows and columns corresponding to the pattern of holes in the or each rigid board of the kit of parts, and a plurality of at least one kind of contact pin.
Claim 10
Dependent Claim
143 words
A kit of parts as claimed in any one of Claims 6 to 8, wherein the or each separately formed flexible sheet (4) of the kit of parts has a coating of copper or other metal or metal alloy of high electrical conductivity on one surface of the sheet, the coating being of such a thickness that, when a pattern of strips and/or pads has been formed from the coating on the sheet and the sheet is secured to a surface of the rigid board in such a way that the pattern of strips and/or pads overlies holes in the rigid board and a pin is urged through a strip or pad into an underlying hole in the rigid board, copper or other electrically conductive metal or metal alloy pierced by the pin will effect an electrical contact with the pin passing therethrough.
Claim 11
Dependent Claim
174 words
For use in the assembly of a circuit board as claimed in any one of Claims 1 to 5, a flexible sheet (4) of electrically insulating material which carries on one of its surfaces a pattern of electrically conductive strips and/or pads (8), which strips and/or pads are of such an electrically conductive material and are of such a thickness that, when the flexible sheet is secured to a surface of a substantially rigid board (1) of which at least the major surfaces are of electrically insulating material and which has extending through the rigid board a multiplicity of holes (2) arranged in a pattern of rows and columns in such a way that the pattern of electrically conductive strips and/or pads is remote from and overlies holes in the rigid board and a pin is urged through an electrically conductive strip or pad and the underlying flexible sheet into an underlying hole in the rigid board, electrically conductive material pierced by the pin will effect an electrical contact with the pin passing therethrough.
References Cited (Backward Citations)
No citation records indexed.
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