Lyotropic liquid crystalline oriented polymer substrate for prin

Details Lyotropic liquid crystalline oriented polymer substrate for prin Lyotropic liquid crystalline oriented polymer substrate for prin

1986-12-16

1989-10-03

Gallagher, John J.

Stock material or miscellaneous articles

Liquid crystal optical display having layer of specified...

With charge transferring layer of specified composition

156150, 156151, 156330, 1563309, 174 685, 427 98, 428901, 428910, 525903, 528373, 548152, C09K 1900

Patent

active

048715956

ABSTRACT:
The present invention is directed to the use of ordered polymers as a substrate material for the preparation of printed wire boards (PWB). In preferred embodiments, the PWB of the present invention comprises a generic, high density, organic multilayer PWB capable of being employed as a high density leadless perimeter and in grid array ceramic chip packages. Specific chip package density requirements are 0.020-in. centers with up to 300 input/outputs (I/Os) for perimeter type packages and 0.050-in. center grid array type packages with up to 240 I/Os per device. In its most preferred embodiments, the present invention is directed to a method of forming a PBT PWB substrate layer of 0.0025 in. or less in thickness. Another preferred aspect of the present invention concerns the discovery that a copper layer can be bonded to a PBT film substrate with a strength comparable to existing PWB materials.

REFERENCES:
patent: 3595736 (1971-07-01), Buteux
patent: 3598637 (1971-08-01), Stoll et al.
patent: 3681297 (1972-08-01), D'Alelio
patent: 4041206 (1977-08-01), Tsunashima et al.
patent: 4353954 (1982-10-01), Yamaoka et al.
patent: 4569885 (1986-02-01), Yamaguchi et al.

Affiliated with

Also associated with

Rating

Lyotropic liquid crystalline oriented polymer substrate for prin does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Lyotropic liquid crystalline oriented polymer substrate for prin, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Lyotropic liquid crystalline oriented polymer substrate for prin will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-663276