Radiation imagery chemistry: process – composition – or product th – Imaging affecting physical property of radiation sensitive... – Radiation sensitive composition or product or process of making
Patent
1983-10-25
1986-04-15
Kittle, John E.
Radiation imagery chemistry: process, composition, or product th
Imaging affecting physical property of radiation sensitive...
Radiation sensitive composition or product or process of making
430270, 430275, 430277, 430312, 430313, 430314, 430318, 430319, 430322, 430329, 430394, 430502, 430503, G03C 1495, G03C 194, G03C 190
Patent
active
045827788
ABSTRACT:
A two layer photopolymer film pack is provided for producing a sequence of an intermediate and a final image on a substrate surface adjacent the film pack upon two successive cycles of exposure through a photo image pattern and development to remove soluble photopolymer. The two layers are of different photopolymers, which have differing solubility characteristics providing for both layers to be removed together by a first developing solution and only one layer to be removed by a different developing solution. This permits the process of this invention namely the successive exposure of a multi-layer photopolymer film to two different photo image patterns to develop intermediate and final hard photopolymer patterns for such methods as photomasking a printed wiring board by use of the intermediate step and producing high resolution printed wire traces in the final step covered by the photopolymer as an insulating solder mask layer. The two layers are of different thicknesses, a very thin layer thus affording very high circuit trace resolution. Two negative acting photopolymer layers are low in cost and sandwiched by an opaque film layer dissolvable in the first developing solution in one embodiment. In another embodiment a positive acting thin layer produces good resolution and a thicker polymer layer provides an electroplating barrier. Thus, a laminated printed wiring board assembly permits custom manufacture of specific circuit boards with less time, less cost, higher quality and fewer steps.
REFERENCES:
patent: 4301230 (1981-11-01), Taguchi et al.
patent: 4325780 (1982-04-01), Schulz, Sr.
patent: 4349620 (1982-09-01), Cyr et al.
patent: 4394437 (1983-07-01), Bergendahl et al.
patent: 4413051 (1983-11-01), Thomas
Brown Laurence R.
Dees Jos,e G.
Kittle John E.
LandOfFree
Multi-function photopolymer for efficiently producing high resol does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Multi-function photopolymer for efficiently producing high resol, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multi-function photopolymer for efficiently producing high resol will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1438790