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 ---------------------------------------------------------------------------------