Adeel, They are correct on asking you to do that. Depends on how many boards you are ordering and what's your min. trace width and clearance it might be very important to have any kind of text printed on the layer. Could be 1, 2, C, B or whatever you want but clearly readable. Why? Because they have to mirror the layer to have the traces/spaces as close to the specified as possible. For example bottom layer comes mirrored when you export the gerber but the top layer is not. The image from the film should be as close to the copper as possible. If the image is on the other side of the film, then your traces will be wider if you understand what I mean.
So, to have this done, they need to have a text properly oriented on your gerber file. Top layer should have a text readable from the top (and they'll mirror the layer). Bottom layer should have a mirrored text (and they won't mirror the layer). The file extension doesn't help if they have many different boards placed on the panel and don't know which one which was. If you don't want the text to appear on your board, place it outside the board outline but it should be there. This is for your good. Help them to manufacture your board correctly. Mira --- Adeel Malik <[EMAIL PROTECTED]> wrote: > Hi All, > My PCB vendor asks me that in order to > correctly ascertain > about the identity of Top Layer and Bottom Layer, I > should manually > write the string �TOP� in the Top Copper Layer and > string �BOTTOM� in > the Bottom Copper Layer. > I tell him that this information is embedded in the > Gerber File > extensions itself. e.g Design.GTL and Design.GBL > means that these files > correspond to Top Copper and Bottom Copper Layers > respectively. > > I wanna ask whether this naming of Gerber file > extensions by Protel > conforms to standard Industry Practice or not ?. If > yes, can someone > comment about the legitimacy of my PCB Vendor�s > opinion that I need to > mention the layer name in text manually. ?.... > > Regards, > Adeel Malik. > > ____________________________________________________________ > You are subscribed to the PEDA discussion forum > > To Post messages: > mailto:[email protected] > > Unsubscribe and Other Options: > http://techservinc.com/mailman/listinfo/peda_techservinc.com > > Browse or Search Old Archives (2001-2004): > http://www.mail-archive.com/[email protected] > > Browse or Search Current Archives (2004-Current): > http://www.mail-archive.com/[email protected] > > __________________________________ Do you Yahoo!? The all-new My Yahoo! - What will yours do? http://my.yahoo.com ____________________________________________________________ You are subscribed to the PEDA discussion forum To Post messages: mailto:[email protected] Unsubscribe and Other Options: http://techservinc.com/mailman/listinfo/peda_techservinc.com Browse or Search Old Archives (2001-2004): http://www.mail-archive.com/[email protected] Browse or Search Current Archives (2004-Current): http://www.mail-archive.com/[email protected]
