Olivia: - Re the hole fill question. Presuming that you are using IPC-A-610C as the acceptability standard for visual inspection, please note that the 50% hole fill is Acceptable for Class 2 ONLY when: 1) the partial hole fill is caused by thermal planes or conductor planes internal to the PWB, 2) solder wetting is 100% of the circumference of the lead and PTH wall on the secondary side, and 3) surrounding PTH's meet the requirements of Table 6-2. - Bottom line, if you meet the criteria above, and can comply with Criteria A of Table 6-2 then the condition is Acceptable. If you don't meet 1), 2), & 3) above and/or can't visually confirm that you meet Criteria A (180 degrees of circumferential wetting on primary side [solder destination side] of the lead and barrel) then the condition must be considered a Defect. - Hope the above helps. If not call (317.773.5570)and we can discuss it further. Regards, Jim Moffitt, Moffitt Consulting Services --------------------------------------------------------------------------------- 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 ---------------------------------------------------------------------------------