In one word. YES! .200 thick parts with holes that small will tend to plug at HAL every time. It most likely will not affect every hole on a board but I would bet it effects some holes on every board. This is also very difficult and time consuming to sort for. I would not be surprised if you actually received some plugged hole even after your suppliers inspection. ED Cosper -----Original Message----- From: TechNet [mailto:[log in to unmask]]On Behalf Of Darrel Therriault Sent: Wednesday, March 29, 2000 7:13 PM To: [log in to unmask] Subject: [TN] B/P Yields Technetters/Fabricators, My supplier is having a problem with yield on our backplane (~.200", SMOBC/HASL). It seems to be centering around hole plugging from HASL. FHS are .024", .028", .032" for both pressfit and pth connectors. Is this a typical problem for these requirements?? If so, what are other finishes to consider to achieve higher yields but not introduce large cost adders?? Comments and suggestions appreciated. Tks........DT ############################################################## 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 ##############################################################