Mike, What is the "primary mask clearance at the location to be postplugged" requirements? I would like to pass this information on to our DFM guys. Thanks Ryan Grant > -----Original Message----- > From: Mike Bailey [SMTP:[log in to unmask]] > Sent: Friday, March 31, 2000 7:53 AM > To: [log in to unmask] > Subject: Re: [TN] via plugging > > I haven't seen any industry guidelines, however, occasionally a customer > who > has been "burned" will specify .002 max. This is achievable with straight > masking operations. If performing separate "postplugging" operations > after > primary mask application and surface finishing etc., it's important to > insure that the primary mask has a clearance at the location that is to be > postplugged. Otherwise if the hole is partially plugged etc., the > secondary > masking operation will leave a very undesirable bump approx. .005-.006 > high. > These specialized operations drive inspectors and CAM operators absolutely > crazy. Additionally, most customers are neither consistent with their data > or assembly needs. Typically, the masking information is the least > considered by a designer. Couple this with third party contract > assemblers > and you have numerous opportunities for error. > > Mike Bailey > Director of Engineering > McCurdy Circuits Inc. > 4900 E. Hunter Ave. > Anaheim, CA 92870 > Phone: 714 507-4900 Ext 253 > FAX: 714 507-4911 > e-mail: [log in to unmask] <mailto:[log in to unmask]> > > -----Original Message----- > From: Rick Babyak [mailto:[log in to unmask]] > Sent: Friday, March 31, 2000 4:47 AM > To: [log in to unmask] > Subject: [TN] via plugging > > > Is there any acceptance criteria or a spec out there that covers via > plugging with mask/ink? > > > > Rick Babyak > Process Engineer > Proto Circuit Inc. > 7 Ascot Parkway > Cuyahoga Falls, OH 44223 > 330-572-3401 Fax:330-572-3434 > [log in to unmask] > > ############################################################## > TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c > ############################################################## > To subscribe/unsubscribe, send a message to [log in to unmask] with > following > text in > the body: > To subscribe: SUBSCRIBE TECHNET <your full name> > To unsubscribe: SIGNOFF TECHNET > ############################################################## > Please visit IPC web site (http://www.ipc.org/html/forum.htm) for > additional > information. > If you need assistance - contact Keach Sasamori at [log in to unmask] or > 847-509-9700 ext.5315 > ############################################################## > > ############################################################## > TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c > ############################################################## > To subscribe/unsubscribe, send a message to [log in to unmask] with > following text in > the body: > To subscribe: SUBSCRIBE TECHNET <your full name> > To unsubscribe: SIGNOFF TECHNET > ############################################################## > Please visit IPC web site (http://www.ipc.org/html/forum.htm) for > additional > information. > If you need assistance - contact Keach Sasamori at [log in to unmask] or > 847-509-9700 ext.5315 > ############################################################## ############################################################## TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c ############################################################## To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TECHNET <your full name> To unsubscribe: SIGNOFF TECHNET ############################################################## Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information. If you need assistance - contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ##############################################################