http://community.webshots.com/album/92088577DPrfBI?415 I posted some pictures of a board I am experimenting with to do a similar job. We are using a local shop to make this SO24 size carrier.. Bill Brooks "Politics is more difficult than Physics" - Albert Einstein -----Original Message----- From: Croslin, Robert [mailto:[log in to unmask]] Sent: Friday, September 26, 2003 10:11 AM To: [log in to unmask] Subject: [TN] Selective Edge Plating Here's a Friday afternoon puzzler. We're participating in a project with another firm who is responsible for designing the circuit and PCB. They just discovered their controller chip wasn't as effective as early testing showed, so they've switched to another. What they want to do is use a daughter board to allow the alternate part to be placed on the footprint of the first part. The footprint of the original part uses an .035 wide pad on a .050 pitch, near as I can measure. It has 15 pads per side on two opposing sides. The concept of the daughter board was to selectively plate two of it's edges to simulate a J leaded device. I've successfully plated the entire edge of some boards for years now, but know of no way to selectively plate "leads" about .030 wide along an edge of an .062 thick board. One house in the Pacific northwest was able to actually do it for some protos, but with a very low yield and refused to take the production order. My local house that's been doing the entire edge for years and another high end house looked at the design and laughed. My recommendation to Sr. Management is to respin the mother board and take the hit. Does anyone know of a house anywhere that could plate (and trim) a plated edge to simulate a lead and is crazy enough to accept an order for 350 pieces total? Bob Croslin Nielsen Media Research --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ----------------------------------------------------- --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 -----------------------------------------------------