Laminate board possessing improved dimensional stability

Details Laminate board possessing improved dimensional stability Laminate board possessing improved dimensional stability

1991-08-30

1993-12-28

Bell, James J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

428273, 428280, 428285, 428287, 428413, 428417, 428901, 428902, B32B 700

Patent

active

052738167

ABSTRACT:
A laminate which has improved dimensional stability may be prepared by impregnating a reinforcing substrate such as a woven glass cloth with an epoxy resin system having a relatively high molecular weight, in excess of about 850, in the presence of a curing agent followed by curing, pressing and post-baking substrate to form the desired laminate board. The variation in this dimensional stability can also be improved by utilizing a B-stage substrate which has been cured to a lower flow percentage.

REFERENCES:
patent: 4751126 (1988-06-01), Oodaira et al.
patent: 4960634 (1990-10-01), Boyko et al.
patent: 4997702 (1991-03-01), Gazit et al.
patent: 5075155 (1991-12-01), Jellinek et al.
patent: 5162977 (1992-11-01), Paurus et al.
IPC Dimensional Stability Test 2.4.39 (The Institute for Interconnecting and Packaging Electronic Circuits).
IPC Resin Flow test 2.3.17.2 (The Institute for Interconnecting and Packaging Electronic Circuits).

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