I've seen it on my boards from AC with the LPI mask but its not there on boards with other Mask types.
-----Original Message----- From: Matt Polak [mailto:[EMAIL PROTECTED]] Sent: Wednesday, October 02, 2002 3:52 PM To: Protel EDA Forum Subject: Re: [PEDA] LPI oxides? ( OT - Good places to get boards populated) >Also thanks for the recommendations on the PCB houses... I got 2 boards back >from Advance Circuits last week and they are great. Few day turnaround and I >didn't even have to speak with a human about the process. They get my thumbs >up. Hey all! I've been using Advanced Circuits for the past year for both prototype and production runs, and the service and support have been absolutely outstanding - on the number of occasions when I've had to ask questions or put in expedited orders, everyone I have talked to on the phone was extremely courteous and knowledgeable, and made you feel like you were a VIP customer even if you were ordering only two units. I've never seen this overall level of customer support before in dealing with any other company - two thumbs up. :> One thing I have seen from AC, though, that I've not seen from anyone else is an oxide finish that they apply under the LPI mask to make it adhere to the copper better. This results in traces on the outer layers showing up in 'black' rather than 'shiny green' like everyone else's boards. It does kind of look cool, but I've never seen this outside of AC's boards. Talking to the head CAM guy there yielded the specific explanation: "That is actually an oxide finish to promote soldermask adhesion. We may be phasing it out shortly, however, so don't be alarmed if you stop seeing it." Out of curiosity, has anyone else ever seen this done before? -- Matt P.S. JaMi, et all -- your recent BGA discussion has been extremely interesting! I'm very soon needing to do some BGA parts (albeit only 256 ball TI parts!) and this have given me a lot of info to digest! Kudos to all who commented in this thread! * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * To post a message: mailto:[EMAIL PROTECTED] * * To leave this list visit: * http://www.techservinc.com/protelusers/leave.html * * Contact the list manager: * mailto:[EMAIL PROTECTED] * * Forum Guidelines Rules: * http://www.techservinc.com/protelusers/forumrules.html * * Browse or Search previous postings: * http://www.mail-archive.com/[email protected] * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
