Adhesion promoter for printed circuits

C - Chemistry – Metallurgy – 23 – C

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

148/16

C23C 22/63 (2006.01)

Patent

CA 1217118

ADHESION PROMOTER FOR PRINTED CIRCUITS ABSTRACT It is among the principal objects of invention to provide a composition and a method for improving the adhesion between a copper foil and a printed circuit substrate by the provision of an adhesion promoting copper oxide layer on the copper film. The provision of copper oxide layers on the surface of copper films by immersion in a chlorite-hydroxide bath as conventionally conducted presents problems of safety and reproducibility. This process is improved by employ- ing an oxidizing solution containing an alkali or alkaline earth metal chlorite at a concentration of from 100 grams per liter to complete saturation, and sodium or potas- sium hydroxide at a concentration of from 5 to 25 grams per liter. The process preferably forms an adhesion im- proving copper oxide film within commercially practical periods of time, on the order of 7 minutes or less, at practically low temperatures, on the order of from 80°F to 200°F, and preferably less than about 140°F. The solution can be sprayed by conventional spray etchers. The copper oxide films produced according to the most preferred conditions are brown in coloration and provide adhesion values according to the standard peel test of greater than about 5 pounds per inch with contact times of from about 3 to about 5 minutes.

432747

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

Adhesion promoter for printed circuits does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Adhesion promoter for printed circuits, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Adhesion promoter for printed circuits will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-1207871

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.