EP0230128A2
Expired / Lapsed
EP
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Method of producing on a polymeric substrate conductive patterns
Assignee: AT&T Inc
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Filing: 1986-12-15
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Granted: —
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Expires: 2006-12-15
Abstract
Abstract Electrically conductive paths are produced on a polymeric substrate (e.g. l3 or 24) by laser (e.g. ll or 2l) writing, i.e., by tracing desired paths on the substrate by a laser beam. The resulting paths comprise electrically conductive carbon as produced by thermal decomposition of substrate surface material; the paths can serve; e.g., as electrical interconnections akin to printed circuitry on a wiring board. Optionally, the conductivity of paths can be enhanced by electroplating a suitable conductor metal or alloy onto the paths.
Inventors
- 👤 Alan Michael Lyons
- 👤 Frederick Thomas Mendenhall, Jr.
- 👤 Nathaniel Richard Quick
- 👤 Murray Robbins
- 👤 Cletus Walter Wilkins, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 05:15
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/10; H05K3/105; H05K2203/00; H05K2203/10; H05K2203/107; H05K2203/11; H05K2203/1136
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
83 words
A method for making a conductive pattern on a substrate of which at least a surface portion comprises a polymeric material, CHARACTERIZED BY directing a laser beam onto said surface portion, causing relative motion between said beam and said substrate so as to delineate a pattern of selected portions of polymeric material on said surface portion, and controlling said motion so as to cause thermal decomposition of selected portions of said material whereby said selected portions are transformed into an electrically conductive material.
Claim 2
Independent Claim
83 words
A method for making a conductive pattern on a substrate of which at least a surface portion comprises a polymeric material, CHARACTERIZED BY directing a laser beam onto said surface portion, causing relative motion between said beam and said substrate so as to delineate a pattern of selected portions of polymeric material on said surface portion, and controlling said motion so as to cause thermal decomposition of selected portions of said material whereby said selected portions are transformed into an electrically conductive material.
Claim 3
Dependent Claim
15 words
Method according to claim l, CHARACTERIZED IN THAT said laser beam traverses an optical lens.
Claim 4
Dependent Claim
16 words
Method according to claim 2, CHARACTERIZED IN THAT said laser beam is defocused by said lens.
Claim 5
Dependent Claim
17 words
Method according to claim l, CHARACTERIZED IN THAT said laser beam is deflected by a movable mirror.
Claim 6
Dependent Claim
27 words
Method according to claim l or 2 or 3 or 4, CHARACTERIZED IN THAT said laser beam is produced by a CO₂ laser or a Nd:YAG laser.
Claim 7
Dependent Claim
19 words
Method according to any one of preceding claims l-5, CHARACTERIZED BY plating metal onto said electrically conductive selected portions.
Claim 8
Dependent Claim
18 words
Method according to any one of preceding claims l-6, CHARACTERIZED IN THAT said substrate is a circuit board.
Claim 9
Dependent Claim
18 words
Method according to any one of preceding claims l-6, CHARACTERIZED IN THAT said substrate is an interconnection block.
Claim 10
Dependent Claim
18 words
Method according to any one of preceding claims l-6, CHARACTERIZED IN THAT said substrate is a module/daughter board.
References Cited (Backward Citations)
No citation records indexed.
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