HOME FAQs BOOKS JOBS: Help Wanted Suggestions you are here: Hotline/Forum => Letter 30019

Subtractive etching of fine pitch circuits

++++

I would like to know how to do subtractive etching of a 30 micron pitch circuit? Any additive or process condition that would help the etch factor? Also, when I etch with CuCl₂ solution the copper leads look wavy at bottom side, but quite straight at top side.

David L [last name deleted for privacy by Editor]
flex circuit manufacture - Austin, Texas, US

ANSWER or FOLLOW UP POST an unrelated QUESTION HOT Topics

Disclaimer: It is not possible to diagnose a finishing problem or the hazards of an operation via these pages. All information
presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The
internet is largely anonymous; some names may be fictitious and some recommendations may be deliberately harmful.

If you are seeking a product or service related to metal finishing, please check these Directories: