You can calculate the aspect ratio by using Board thickness to Min drill size in the board -----Original Message----- From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On Behalf Of RameshK Cozerv IN HO Sent: Thursday, September 28, 2006 2:38 PM To: si-list@xxxxxxxxxxxxx Subject: [SI-LIST] Aspect Ratio Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Hi Pcb Guru's, Can someone explain to me about Aspect ratio, how it is calculated,what should be its Min & Max. <http://www.incredimail.com/index.asp?lang=9&version=4001930&aff_id=10096&ad don=IncrediMail&id=95202&guid=DAACE287-9C8D-4275-89A1-F61C45653B6A> Regards, Ramesh PCB Design Engineer Product development Conzerv Systems Pvt Ltd. (formerly Enercon systems Pvt Ltd) 44p Electronic City Phase ll Hosur Road Bangalore-560100 ph : 91 80 51189751 Email : ramesh.k@xxxxxxxxxxx Website : www.conzerv.com <http://www.conzerv.com/> Hand's that HELP are better than Lip's that PRAY ############################################################################ ######### Note: This message is for the named person's use only. It may contain confidential, proprietary or legally privileged information. No confidentiality or privilege is waived or lost by any mistransmission. If you receive this message in error, please immediately delete it and all copies of it from your system, destroy any hard copies of it and notify the sender. You must not, directly or indirectly, use, disclose, distribute, print, or copy any part of this message if you are not the intended recipient. ConZerv Systems Pvt. Ltd. and any of its subsidiaries each reserve the right to monitor all e-mail communications through its networks. 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