The highest voltage we will see is +5v. So you feel it's an electrical isolation issue? Thanks -----Original Message----- From: Joyce Koo [mailto:[log in to unmask]] Sent: Tuesday, September 18, 2012 6:10 PM To: [log in to unmask]; Foster, John @ CSG - PHOTONICS Subject: Re: [TN] question about 6012 What voltage of your application? Some of hid operated at blow 4v. 1.8 are common. If you are working on 18v, I would be a bit of worry. -------------------------- Sent using BlackBerry ----- Original Message ----- From: John Foster [mailto:[log in to unmask]] Sent: Tuesday, September 18, 2012 09:03 PM To: [log in to unmask] <[log in to unmask]> Subject: [TN] question about 6012 I am curious about the 3.543 uin dielectric spacing recommendation in 6012C 3.6.2.15. I have to believe that this Number did not just come out of thin air. I have been searching for any long term reliability issues related to going below this number. I know that HDI structures and embedded capacitors use very thin dielectrics and the spec recommends low profile copper when going below this number. We are doing Class 3 boards and I am just trying to make sure I am not shooting myself in the head going below this number. Thanks in advance ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ --------------------------------------------------------------------- This transmission (including any attachments) may contain confidential information, privileged material (including material protected by the solicitor-client or other applicable privileges), or constitute non-public information. Any use of this information by anyone other than the intended recipient is prohibited. If you have received this transmission in error, please immediately reply to the sender and delete this information from your system. Use, dissemination, distribution, or reproduction of this transmission by unintended recipients is not authorized and may be unlawful. ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________