Hmmmm, I guess this is a "gray area" from the lack of response. It's whatever tickles your fancy I suppose... Myself, I don't think a partial clinch vs. straight through, makes much of a difference as far as reliabilty...like to hear differing opinions if there are any... I also think that a plated barrel with two annular pads on both sides of a flex circuit is considered to be a supported hole...I'd also like to hear differing opinions on that... Tia... -Steve Gregory- << Hi ya'll! Couple of quick questions about flex circuits: 1. What kind of hole on a flex circuit with a anular pad on the top and bottom of PTH location, and a plated barrel (even if it is only 10-mils tall), considered? Supported, or unsupported? 2. Does clinching axial through hole components on a flex circuit with the above described flex (there's also a stiffener that is bonded to the flex where the components are located) buy you anything as far as solder joint strength? (I'm not talking a full clinch, just a partial clinch) Thanks! -Steve Gregory- >> --------------------------------------------------------------------------------- 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 ---------------------------------------------------------------------------------