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Mail Archives: geda-user/2016/04/13/10:05:06

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Subject: [geda-user] some new footprints coming (was: invert pcb output)
To: geda-user AT delorie DOT com
References: <570D93A4 DOT 4090609 AT ecosensory DOT com>
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From: "John Griessen (john AT ecosensory DOT com) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
Message-ID: <570E51DF.3050701@ecosensory.com>
Date: Wed, 13 Apr 2016 09:04:15 -0500
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On 04/13/2016 02:48 AM, Britton Kerin (britton DOT kerin AT gmail DOT com) [via geda-user AT delorie DOT com] wrote:
> FWIW I used to make boards with photoresist and etch and the
> straight-to-ps output always worked right for me (if it was off by a
> pixel I didn't notice).

I have tested that and can use -0.04mm bloat setting to get small changes, so yes
that is working with a HP 5si printer.  It's not off by enough to see.at 50X magnification.

Will be etching test breakout boards for SOT666 SOT363 SOT563 SC70-6 dual FET packages.
Some are new packages, so I will put up on gedasymbols.org.  Here's what the test boards
look like:   https://u2655086.ct.sendgrid.net/wf/click?upn=NM-2BB8yPXqF3SI1y9Q83nXYyiE3TdYSrEhJrTVKxujcmXa52dx2yWJLOnAe46o99nZPvECNbnRlkVdV-2FIc7dqyw-3D-3D_kTMYR7gw96EXSJsK4eeHVzkKdlAq-2BspPcYaZStVviucet3-2Fn-2FULFIP3pDeqnnNVJuj1U43hSgKYdEsqV8cu5hK4dslZPTINXp2MLw3wUXT-2F1NRqd-2BShu5uqCq745hK6n36aAQs0yLEJtcC-2BhT-2FGzBm05IUmOw9qFE66E8FwTvyCgoltjkUbnOfUYY7boi2B3Y5teYJYbBULiRsUMKSrVqw-3D-3D

One FET, the PMDT290UNE is in a package SOT666 which is a little different than SOT563, but sort of close enough
for my tests.  So that's why you see the copper text SOT563 N PMDT290UNE.

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<p>On 04/13/2016 02:48 AM, Britton Kerin (britton DOT kerin AT gmail DOT com) [via geda-user AT delorie DOT com] wrote:</p>
<blockquote><p>FWIW I used to make boards with photoresist and etch and the straight-to-ps output always worked right for me (if it was off by a pixel I didn't notice).</p></blockquote>
<p>I have tested that and can use -0.04mm bloat setting to get small changes, so yes that is working with a HP 5si printer.  It's not off by enough to see.at 50X magnification.</p>
<p>Will be etching test breakout boards for SOT666 SOT363 SOT563 SC70-6 dual FET packages. Some are new packages, so I will put up on gedasymbols.org.  Here's what the test boards look like:   <a href="https://u2655086.ct.sendgrid.net/wf/click?upn=NM-2BB8yPXqF3SI1y9Q83nXYyiE3TdYSrEhJrTVKxujcmXa52dx2yWJLOnAe46o99nZPvECNbnRlkVdV-2FIc7dqyw-3D-3D_kTMYR7gw96EXSJsK4eeHVzkKdlAq-2BspPcYaZStVviucet3-2Fn-2FULFIP3pDeqnnNVJ-2BD7Gtdj91KmYrXqF2yoi8JU3AJs-2FiTmerf2wPxQ7bqkHFnuoeOQ76Pl6VJoniXRQehWvJYVVQlDH81IZDqwNmtqgLnKbTkyfRhmvrHasgkXKLG-2BybOBkSoqz8d8-2FHLR8EqN-2BehO5xZ0VqESulBmc2w-3D-3D">http://ecosensory.com/geda/fet_leak-test.png</a></p>
<p>One FET, the PMDT290UNE is in a package SOT666 which is a little different than SOT563, but sort of close enough for my tests.  So that's why you see the copper text SOT563 N PMDT290UNE.</p>

<img src="https://u2655086.ct.sendgrid.net/wf/open?upn=kTMYR7gw96EXSJsK4eeHVzkKdlAq-2BspPcYaZStVviucet3-2Fn-2FULFIP3pDeqnnNVJqb5ezQvfh24UKhmpwGpa1iqVJdyipZ6k-2BN5kWVJfHoQjK3KUaEptcRz323liZ9EZf3j2yp21XkrBgRviZUiS74kgnAMupSUro1dGnr5dPPq0C6sdQ2ipRGC9jffjL-2BlTB7JSMRgJBDg-2Bfegw0SkuMd9WPoeW9CSFnYtDsvLBmc4-3D" alt="" width="1" height="1" border="0" style="height:1px !important;width:1px !important;border-width:0 !important;margin-top:0 !important;margin-bottom:0 !important;margin-right:0 !important;margin-left:0 !important;padding-top:0 !important;padding-bottom:0 !important;padding-right:0 !important;padding-left:0 !important;"/>
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