Roland: Thanks for your input. Most popular copper foil thickness is 0.5 OZ, 1 OZ, 2 OZ; Thicker foil like 3 OZ and 4 OZ is available too; Thinner foil may range from 0.6 um to 12 um, such as 0.6, 3, 9, 12 um (some of them with carrier which is typically 18 um; Someone say 3 um is microthin, 0.6 um is ultrathin. Thanks and best regards William ---------- From: Roland To: TechNet E-Mail Forum.; Wang, William (Suzhou Laminate) Subject: Re: [TN] PCB use 1 OZ & H OZ copper Date: Monday, September 13, 1999 1:10PM IMO, Incoming material should be checked, there is small devices to check copper thickness If not detected with incoming.. then when etching the result will show either not completely etched.. which leads to suspicion of incorrect copper thickness, or over etched leading to same. In both cases we are in trouble, both the manufacturer and the supplier.. Then UN will send US militaries .... oups... no, Manufacturer's lawyer will contact supplier's lawyer... we will likely end up like grown ups settling the matter through our quality specialist that will ask for guarantees that it won't be possible to happen in the future ... and get substancial credit note over some more material... if this is a repeat, then you won't be the supplier of this PCB manufacturer... I have an other question to you... What are the copper thicknesses that are available on the market today ? 0.125 oz 0.250 0.5 1.0 2.0 3.0 ??? ----- Original Message ----- From: Wang, William (Suzhou Laminate) <[log in to unmask]> To: <[log in to unmask]> Sent: Monday, September 13, 1999 3:39 AM Subject: [TN] PCB use 1 OZ & H OZ copper > I work for a copper clad laminate company. What will happen if I > send wrong copper foil thickness laminate to PCB fabricator? > 1. Customer require 1 OZ on both sides, but I send o.5 OZ on both > sides > 2. Customer require 0.5 OZ on both sides, but I send 1 OZ on both > sides > It's just a scenario analysis. > > Thanks and best regards > William > QA Manager > ISOLA Laminate Systems Suzhou > > ############################################################## > 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 Gayatri Sardeshpande at [log in to unmask] or > 847-509-9700 ext.5365 > ############################################################## > ############################################################## 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 Gayatri Sardeshpande at [log in to unmask] or 847-509-9700 ext.5365 ##############################################################