Allowing the board fabricator to define the board you expect to receive is fine, as long as they do a good job. Regardless of the existence of a clear product definition or not, it�s reasonable for you to argue that your receipts must meet the requirements of A-600 - Acceptability of Printed Boards. A-600 is, as you suggest, the board fabricators� analog of the assemblers� A-610.
In your procurement specification, consider defining: * Feature clearance * Solder resist coverage * Performance requirements of the mask * Cure and adhesion * Resist thickness
These specifications will vary with the type of resist you use [ie, wet film, dry film, Liquid Photo-Imageable]. So, be careful that you don�t get too specific about too many things and get wrapped around the axial. Your supplier should able to help you be specific, without being restrictive.
Ask your designers if may be they should spring for: * IPC-2221 - Generic Standard On Printed Board Design * IPC-2222 - Sectional Design Standard For Printed Board For Organic Printed Boards * IPC-6011 - Generic Performance Specification For Printed Boards * IPC-6012A - Qualification & Performance For Rigid Printed Boards
reply »