Transfer sheet and production method of the same and wiring...

Details Transfer sheet and production method of the same and wiring... Transfer sheet and production method of the same and wiring...

2005-08-30

2005-08-30

Lam, Cathy F. (Department: 1775)

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

C428S192000, C428S344000, C174S250000, C174S258000

Reexamination Certificate

active

06936336

ABSTRACT:
A transfer sheet for use in forming a conductor circuit comprises a base and a metal layer formed into a circuit pattern on the base. The metal layer is transferred onto a surface of an insulation layer. At least part of the circuit pattern of the metal layer is formed by laser-processing. Since it is possible, without using an etching process and a plating process at a minute part of the conductor circuit, to remove the metal layer by emitting laser light having a minute beam diameter, it is possible to form a minute conductor circuit which is 50 μm or less in width and pitch, with the result that it is prevented that the conductor circuit has a break because of excessive etching and a failure of plating deposition or the conductor circuit is short-circuited because of the residue of etching and a short of plating.

REFERENCES:
patent: 4421827 (1983-12-01), Phillips
patent: 4762747 (1988-08-01), Liu et al.
patent: 5725706 (1998-03-01), Thoma et al.
patent: 6346335 (2002-02-01), Chen et al.
patent: 10-051108 (1998-02-01), None
patent: 11-121898 (1999-04-01), None
patent: 11-354909 (1999-12-01), None
patent: 2001-068813 (2001-03-01), None
patent: 3245988 (2001-11-01), None

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