Jim, We have a captive board shop and use polyimide labels with an acrylic adhesive to ID the bare boards. These labels are applied at final inspection, and the numbers are recorded on the inspection record for that lot. Our bare board artwork contains the corners of the label , so the location is always indicated on the board itself. The polyimide / acrylic combination withstands immersion in the wave solder, so we put the labels on the circuit side and don't take up valuable component-side space. We presently use .250" x 1.250" labels to accomodate an 8-digit, Code 39 bar code with human readable subscript. (We could reduce the size to something like .200" x .650", and still keep the human readable numbers if we went to an Interleaved code 2 of 5 and didn't need alphabetic characters.) We have used pre-printed, sequentially-numbered labels, and we have also printed our own, with about equal success. This whole scheme essentially amounts to serializing the boards, which gives us traceability in the FAB side, and gives the ASSY group a unique identifier (serial number) The assembly group uses indelible ink pens to write various information in the board, and the test group uses stamp pads for their needs. In the end, the bar code number is the one that gets recorded at our final gate. Mike Matson Manufacturing Engineer Woodward Governor Company Fort Collins, CO (970)498-3285 [log in to unmask],com ---------- From: TechNet-request To: technet Subject: Lables for Card Assemblies Date: Thursday, October 10, 1996 12:26PM Hi; We are looking to make our raw printed circuit cards more "friendly" for labeling/barcoding/etc. at the assembled pc card level, particularly for our OEM customer base. I'd like to gather some data on what other assembly houses "like" and "use" for labeling schemes. Do you prefer adhesive labels or some marking direct on the pc card? does it help to have white ID encircle the label location? Any information, general or specific would be helpful. thanks! Jim Herard Product Quality Engineering IBM Microelectronics, Endicott Printed Circuit Fabrication [log in to unmask] *************************************************************************** *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To unsubscribe from this list at any time, send a message to: * * [log in to unmask] with <subject: unsubscribe> and no text. * ***************************************************************************