Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond
Patent
1997-12-02
2000-02-01
Jones, Deborah
Stock material or miscellaneous articles
Structurally defined web or sheet
Discontinuous or differential coating, impregnation or bond
174262, 174266, 430 16, 442 19, 442 23, 442 31, 428901, B32B 300, G03C 300, H01R 909
Patent
active
060200499
ABSTRACT:
A reinforced laminate that is consists of conventional glass mesh, TEFLON mesh, etc. with copper clad to one or both sides and a positive or negative acting photoimageable dielectric material impregnated in the mesh. This photoimageable dielectric material is a substitute for conventional dielectrics like epoxy, polyimides, etc. This laminate construction will allow for via formation using established manufacturing methods for producing vias in printed circuits with minor process variations. This product will eliminate major process steps such as mechanical drilling, laser drilling and plasma etching. It will allow most printed circuit producers the capability of producing complex multilayer circuits that currently produced by relatively few circuit manufacturers. It eliminates processes such as plasma etching and laser processing and other capital-intensive methods that are currently in development or use. A further development as a result of this product allows for producing vias of any shape e.g. square holes, elliptical holes, slots, etc. It also results in certain designs for producing solid metal vias e.g. copper posts, which have higher conductivity and superior mechanical properties.
REFERENCES:
patent: 4403653 (1983-09-01), Davidson
patent: 5022956 (1991-06-01), Cziep et al.
patent: 5283107 (1994-02-01), Bayer et al.
patent: 5421083 (1995-06-01), Suppelsa et al.
patent: 5700607 (1997-12-01), Rath et al.
patent: 5858615 (1999-01-01), Hawkins
Jones Deborah
Lam Cathy F.
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