Tech Spray make Wondermask P and Wondermask PL - the former is synthetic latex, non-ammoniated, the latter is natural latex and contains ammonia. Peter -- ========================================================= Peter Swanson [log in to unmask] INTERTRONICS http://www.intertronics.co.uk INTERTRONICS is dedicated to providing quality material, consumable and equipment solutions to the electronics manufacturing and other technology based industries, with the highest levels of technical support and customer service. -----Original Message----- From: Hans Hinners [mailto:[log in to unmask]] Sent: 17 January 2001 19:43 To: [log in to unmask] Subject: Re: [TN] Special through hole pad design Hi Phil, Ken and All, Does that Techspray Wondermask have ammonia in it? I had to eliminate that from my ancient Hollis waveflow process as a possible cause of over oxidation. Something I learned from the list in fact. Hans ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Hans M. Hinners Process Engineer Toppan Electronics, Inc. 770 Miramar Road San Diego, CA 92126 (858) 695 - 2222 ext. 241 (858) 695 - 6823 fax [log in to unmask] -----Original Message----- From: Phil Nutting [mailto:[log in to unmask]] Sent: Wednesday, January 17, 2001 5:21 AM To: [log in to unmask] Subject: Re: [TN] Special through hole pad design We use two methods. 1) peelable solder mask Techspray Wondermask P 2) holes with no plating through and about a 10 mil ring of no copper on the inside diameter of the land. -----Original Message----- From: Ken Fong [mailto:[log in to unmask]] Sent: Wednesday, January 17, 2001 12:48 AM To: [log in to unmask] Subject: [TN] Special through hole pad design Technetters, Could anyone advise a design of soldering pad which will not be closed with solder during wavesoldering when the hole is not inserted with component, but it can form a normal solder joint when a component is inserted through the hole with the lead clinched by auto-insertion machine? The board is 1.6mm thick single sided pcb. Thanks. Ken ------------------------------------------------------------------------ ---- ----- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d 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 delivery of Technet send the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or 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 1.8d 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 delivery of Technet send the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or 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 1.8d 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 delivery of Technet send the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or 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 1.8d 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 delivery of Technet send the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------------