X-Authentication-Warning:	delorie.com: mail set sender to geda-user-bounces using -f
X-Recipient:	geda-user AT delorie DOT com
X-Spam-Checker-Version:	SpamAssassin 3.3.1 (2010-03-16) on
	ham02.websitewelcome.com
X-Spam-Flag2999:	NO
X-Spam-Level2999:
X-Spam-Status2999:	"No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham
	version=3.3.1
DomainKey-Signature:	a=rsa-sha1; q=dns; c=nofws; s=default; d=gibibit.com;
	h=Received:Date:From:To:Subject:Message-ID:In-Reply-To:References:X-Mailer:Mime-Version:Content-Type:X-BWhitelist:X-Source:X-Source-Args:X-Source-Dir:X-Source-Sender:X-Source-Auth:X-Email-Count:X-Source-Cap;
	b=MeLFDNfgCxBSKk4SRMqyt1cIZ7S1ccW6U25wXCcG1wfRBlRK0WnORvHk4U3Y9ppbaxvGCzadq3gRvbk0sF8W+cshoJmHdrlXRqybg8YGZzDL31InQXGjKic1w2s7Sq4H;
Date:	Fri, 23 Mar 2012 16:58:30 -0700
From:	Colin D Bennett <colin AT gibibit DOT com>
To:	geda-user AT delorie DOT com
Subject:	Re: [geda-user] Solder paste/nopaste flag overlapping, and custom
	paste apertures
Message-ID:	<20120323165830.7e72da02@svelte>
In-Reply-To:	<201203232307.q2NN7qL4011010@envy.delorie.com>
References:	<20120323153154 DOT 31f9090d AT svelte>
	<201203232307 DOT q2NN7qL4011010 AT envy DOT delorie DOT com>
X-Mailer:	Claws Mail 3.8.0 (GTK+ 2.24.10; x86_64-pc-linux-gnu)
Mime-Version:	1.0
X-AntiAbuse:	This header was added to track abuse, please include it with any abuse report
X-AntiAbuse:	Primary Hostname - gator297.hostgator.com
X-AntiAbuse:	Original Domain - delorie.com
X-AntiAbuse:	Originator/Caller UID/GID - [47 12] / [47 12]
X-AntiAbuse:	Sender Address Domain - gibibit.com
X-BWhitelist:	no
X-Source:
X-Source-Args:
X-Source-Dir:
X-Source-Sender:	c-67-160-113-82.hsd1.wa.comcast.net (svelte) [67.160.113.82]:36297
X-Source-Auth:	colin AT gibibit DOT com
X-Email-Count:	2
X-Source-Cap:	c2t5bGVuO3NreWxlbjtnYXRvcjI5Ny5ob3N0Z2F0b3IuY29t
Reply-To:	geda-user AT delorie DOT com
Errors-To:	nobody AT delorie DOT com
X-Mailing-List:	geda-user AT delorie DOT com
X-Unsubscribes-To:	listserv AT delorie DOT com

--MP_/kq2+nsYE1yqObS6n/gxLFse
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
Content-Disposition: inline

On Fri, 23 Mar 2012 19:07:52 -0400
DJ Delorie <dj AT delorie DOT com> wrote:

> 
> The centerpad of one of my chips looks like this:
> 
> 	Pad[3937 3937 3937 3937 1968 2000 2568 "" "EP" "edge2"]
> 	Pad[0 3937 0 3937 1968 2000 2568 "" "EP" ""]
> 	Pad[-3937 3937 -3937 3937 1968 2000 2568 "" "EP" ""]
> 	Pad[3937 0 3937 0 1968 2000 2568 "" "EP" "edge2"]
> 	Pad[-3937 0 -3937 0 1968 2000 2568 "" "EP" ""]
> 	Pad[3937 -3937 3937 -3937 1968 2000 2568 "" "EP" "edge2"]
> 	Pad[0 -3937 0 -3937 1968 2000 2568 "" "EP" ""]
> 	Pad[-3937 -3937 -3937 -3937 1968 2000 2568 "" "EP" ""]
> 	Pad[0 0 0 0 1968 2000 2568 "" "EP" ""]
> 	Pad[0 0 0 0 11811 2000 0 "" "EP" "square,nopaste"]
> 
> That's nine paste dots on a solid copper pad

How has that been working for you?  Good yield on your boards? 
I read an article somewhere that described a modification of this
where the QFN exposed pad is actually segmented by solder mask as
well as the paste stencil -- this keeps the solder evenly
distributed even if the chip tries to tilt a bit.  My attempt at
this is attached for reference.

> However, in your footprint, you set the solder *mask* to zero,
> which covered the pad, and shrunk the valid paste size to zero
> also.

Doh!  I did just figure that out a few minutes ago by reading the
pcb source code (note to self: always RTFS!!).
Thanks for the info.

Regards,
Colin

--MP_/kq2+nsYE1yqObS6n/gxLFse
Content-Type: application/octet-stream; name=QFN32_5_EP_multi_opening.fp
Content-Transfer-Encoding: base64
Content-Disposition: attachment; filename=QFN32_5_EP_multi_opening.fp

IyBBdXRob3I6IENvbGluIEQgQmVubmV0dCA8Y29saW5AZ2liaWJpdC5jb20+CiMgUmV2aXNpb246
IDEKIyBEYXRlOiAyMDExLTA1LTA0CiMKIyBGb290cHJpbnQgZm9yIFFGTi0zMiAoNSBtbSB4IDUg
bW0pIHdpdGggZXhwb3NlZCBjZW50ZXIgcGFkZGxlLCB3aGVyZSB0aGUKIyBjZW50ZXIgcGFkZGxl
IGhhcyBiZWVuIGFsdGVyZWQgZm9yIGltcHJvdmVkIHNvbGRlcmluZyByZWxpYWJpbGl0eS4KIwoj
IE5PVEU6IFR1cm4gb24gdGhlIHNvbGRlciBtYXNrIHZpZXcgdG8gc2VlIHRoZSBlZmZlY3Qgb2Yg
dGhpcyBmb290cHJpbnQhCiMKIyBJbnN0ZWFkIG9mIGEgbGFyZ2UgY2VudGVyIHBhZGRsZSB0aGF0
IG1heSBob2xkIHRvbyBtdWNoIHNvbGRlciwgdGhlIG11bHRpcGxlCiMgc21hbGxlciBwYWRzICh0
aGUgc2l6ZSBvZiB0aGUgbm9ybWFsIHBhY2thZ2UgcGFkcykgYXJlIHRoZSBvbmx5IG9wZW5pbmcK
IyB0aHJvdWdoIHRoZSBzb2xkZXIgbWFzay4KIwojCiMgUmVmZXJlbmNlcwojIC0tLS0tLS0tLS0K
IwojIOKAnE5vdmVsIFFGTiBMYW5kIFBhdHRlcm4u4oCdCiMgPGh0dHA6Ly9ibG9nLnNjcmVhbWlu
Z2NpcmN1aXRzLmNvbS8yMDA5LzAxL25vdmVsLXFmbi1sYW5kLXBhdHRlcm4uaHRtbD4uCiMKIyBB
dG1lbCBwYWNrYWdlIGRyYXdpbmcgMzJRTjIgcmV2LiBBLiAgQXRtZWwgQVQ4NlJGMjMxIGRhdGEg
c2hlZXQgcGcuIDE3NC4KIyA8aHR0cDovL3d3dy5hdG1lbC5jb20vZHluL3Jlc291cmNlcy9wcm9k
X2RvY3VtZW50cy9kb2M4MTExLnBkZj4sIHBnLiAxNzQuCgoKRWxlbWVudFsiIiAiUUZOLTMyIDV4
NSB3aXRoIG11bHRpLXdpbmRvdyBwYWRkbGUiICJVPyIgIiIgOTg2MjIgNDc0NDEgLTExNjE0IC0x
ODMwNyAwIDEwMCAiIl0KKAoJUGFkWy0xMDI3NSAtNjg4OSAtODYyMiAtNjg4OSAxMTAyIDIwMDAg
MTQxNyAiMSIgIjEiICJzcXVhcmUiXQoJUGFkWy0xMDI3NSAtNDkyMSAtODYyMiAtNDkyMSAxMTAy
IDIwMDAgMTQxNyAiMiIgIjIiICJzcXVhcmUiXQoJUGFkWy0xMDI3NSAtMjk1MiAtODYyMiAtMjk1
MiAxMTAyIDIwMDAgMTQxNyAiMyIgIjMiICJzcXVhcmUiXQoJUGFkWy0xMDI3NSAtOTg0IC04NjIy
IC05ODQgMTEwMiAyMDAwIDE0MTcgIjQiICI0IiAic3F1YXJlIl0KCVBhZFstMTAyNzUgOTg0IC04
NjIyIDk4NCAxMTAyIDIwMDAgMTQxNyAiNSIgIjUiICJzcXVhcmUiXQoJUGFkWy0xMDI3NSAyOTUy
IC04NjIyIDI5NTIgMTEwMiAyMDAwIDE0MTcgIjYiICI2IiAic3F1YXJlIl0KCVBhZFstMTAyNzUg
NDkyMSAtODYyMiA0OTIxIDExMDIgMjAwMCAxNDE3ICI3IiAiNyIgInNxdWFyZSJdCglQYWRbLTEw
Mjc1IDY4ODkgLTg2MjIgNjg4OSAxMTAyIDIwMDAgMTQxNyAiOCIgIjgiICJzcXVhcmUiXQoJUGFk
Wy02ODg5IDg2MjIgLTY4ODkgMTAyNzUgMTEwMiAyMDAwIDE0MTcgIjkiICI5IiAic3F1YXJlLGVk
Z2UyIl0KCVBhZFstNDkyMSA4NjIyIC00OTIxIDEwMjc1IDExMDIgMjAwMCAxNDE3ICIxMCIgIjEw
IiAic3F1YXJlLGVkZ2UyIl0KCVBhZFstMjk1MiA4NjIyIC0yOTUyIDEwMjc1IDExMDIgMjAwMCAx
NDE3ICIxMSIgIjExIiAic3F1YXJlLGVkZ2UyIl0KCVBhZFstOTg0IDg2MjIgLTk4NCAxMDI3NSAx
MTAyIDIwMDAgMTQxNyAiMTIiICIxMiIgInNxdWFyZSxlZGdlMiJdCglQYWRbOTg0IDg2MjIgOTg0
IDEwMjc1IDExMDIgMjAwMCAxNDE3ICIxMyIgIjEzIiAic3F1YXJlLGVkZ2UyIl0KCVBhZFsyOTUy
IDg2MjIgMjk1MiAxMDI3NSAxMTAyIDIwMDAgMTQxNyAiMTQiICIxNCIgInNxdWFyZSxlZGdlMiJd
CglQYWRbNDkyMSA4NjIyIDQ5MjEgMTAyNzUgMTEwMiAyMDAwIDE0MTcgIjE1IiAiMTUiICJzcXVh
cmUsZWRnZTIiXQoJUGFkWzY4ODkgODYyMiA2ODg5IDEwMjc1IDExMDIgMjAwMCAxNDE3ICIxNiIg
IjE2IiAic3F1YXJlLGVkZ2UyIl0KCVBhZFs4NjIyIDY4ODkgMTAyNzUgNjg4OSAxMTAyIDIwMDAg
MTQxNyAiMTciICIxNyIgInNxdWFyZSxlZGdlMiJdCglQYWRbODYyMiA0OTIxIDEwMjc1IDQ5MjEg
MTEwMiAyMDAwIDE0MTcgIjE4IiAiMTgiICJzcXVhcmUsZWRnZTIiXQoJUGFkWzg2MjIgMjk1MiAx
MDI3NSAyOTUyIDExMDIgMjAwMCAxNDE3ICIxOSIgIjE5IiAic3F1YXJlLGVkZ2UyIl0KCVBhZFs4
NjIyIDk4NCAxMDI3NSA5ODQgMTEwMiAyMDAwIDE0MTcgIjIwIiAiMjAiICJzcXVhcmUsZWRnZTIi
XQoJUGFkWzg2MjIgLTk4NCAxMDI3NSAtOTg0IDExMDIgMjAwMCAxNDE3ICIyMSIgIjIxIiAic3F1
YXJlLGVkZ2UyIl0KCVBhZFs4NjIyIC0yOTUyIDEwMjc1IC0yOTUyIDExMDIgMjAwMCAxNDE3ICIy
MiIgIjIyIiAic3F1YXJlLGVkZ2UyIl0KCVBhZFs4NjIyIC00OTIxIDEwMjc1IC00OTIxIDExMDIg
MjAwMCAxNDE3ICIyMyIgIjIzIiAic3F1YXJlLGVkZ2UyIl0KCVBhZFs4NjIyIC02ODg5IDEwMjc1
IC02ODg5IDExMDIgMjAwMCAxNDE3ICIyNCIgIjI0IiAic3F1YXJlLGVkZ2UyIl0KCVBhZFs2ODg5
IC0xMDI3NSA2ODg5IC04NjIyIDExMDIgMjAwMCAxNDE3ICIyNSIgIjI1IiAic3F1YXJlIl0KCVBh
ZFs0OTIxIC0xMDI3NSA0OTIxIC04NjIyIDExMDIgMjAwMCAxNDE3ICIyNiIgIjI2IiAic3F1YXJl
Il0KCVBhZFsyOTUyIC0xMDI3NSAyOTUyIC04NjIyIDExMDIgMjAwMCAxNDE3ICIyNyIgIjI3IiAi
c3F1YXJlIl0KCVBhZFs5ODQgLTEwMjc1IDk4NCAtODYyMiAxMTAyIDIwMDAgMTQxNyAiMjgiICIy
OCIgInNxdWFyZSJdCglQYWRbLTk4NCAtMTAyNzUgLTk4NCAtODYyMiAxMTAyIDIwMDAgMTQxNyAi
MjkiICIyOSIgInNxdWFyZSJdCglQYWRbLTI5NTIgLTEwMjc1IC0yOTUyIC04NjIyIDExMDIgMjAw
MCAxNDE3ICIzMCIgIjMwIiAic3F1YXJlIl0KCVBhZFstNDkyMSAtMTAyNzUgLTQ5MjEgLTg2MjIg
MTEwMiAyMDAwIDE0MTcgIjMxIiAiMzEiICJzcXVhcmUiXQoJUGFkWy02ODg5IC0xMDI3NSAtNjg4
OSAtODYyMiAxMTAyIDIwMDAgMTQxNyAiMzIiICIzMiIgInNxdWFyZSJdCglQYWRbLTgyNiAtNDky
MSA4MjcgLTQ5MjEgMTEwMiAyMDAwIDE0MTcgIjMzIiAiMzMiICJzcXVhcmUsZWRnZTIiXQoJUGFk
Wy04MjYgLTI1NTkgODI3IC0yNTU5IDExMDIgMjAwMCAxNDE3ICIzMyIgIjMzIiAic3F1YXJlLGVk
Z2UyIl0KCVBhZFszMjY4IC00OTIxIDQ5MjEgLTQ5MjEgMTEwMiAyMDAwIDE0MTcgIjMzIiAiMzMi
ICJzcXVhcmUsZWRnZTIiXQoJUGFkWy00OTIxIC00OTIxIC0zMjY4IC00OTIxIDExMDIgMjAwMCAx
NDE3ICIzMyIgIjMzIiAic3F1YXJlIl0KCVBhZFstODI3IDQ5MjEgODI2IDQ5MjEgMTEwMiAyMDAw
IDE0MTcgIjMzIiAiMzMiICJzcXVhcmUsZWRnZTIiXQoJUGFkWy04MjcgMjU1OSA4MjYgMjU1OSAx
MTAyIDIwMDAgMTQxNyAiMzMiICIzMyIgInNxdWFyZSxlZGdlMiJdCglQYWRbLTQ5MjEgNDkyMSAt
MzI2OCA0OTIxIDExMDIgMjAwMCAxNDE3ICIzMyIgIjMzIiAic3F1YXJlIl0KCVBhZFszMjY4IDQ5
MjEgNDkyMSA0OTIxIDExMDIgMjAwMCAxNDE3ICIzMyIgIjMzIiAic3F1YXJlLGVkZ2UyIl0KCVBh
ZFstNDkyMSAtODI3IC00OTIxIDgyNiAxMTAyIDIwMDAgMTQxNyAiMzMiICIzMyIgInNxdWFyZSxl
ZGdlMiJdCglQYWRbLTI1NTkgLTgyNyAtMjU1OSA4MjYgMTEwMiAyMDAwIDE0MTcgIjMzIiAiMzMi
ICJzcXVhcmUsZWRnZTIiXQoJUGFkWzQ5MjEgLTgyNiA0OTIxIDgyNyAxMTAyIDIwMDAgMTQxNyAi
MzMiICIzMyIgInNxdWFyZSxlZGdlMiJdCglQYWRbMjU1OSAtODI2IDI1NTkgODI3IDExMDIgMjAw
MCAxNDE3ICIzMyIgIjMzIiAic3F1YXJlLGVkZ2UyIl0KCVBhZFstMzk0IDM5NCAzOTQgMzk0IDEy
MjA1IDIwMDAgMTQxNyAiMzMiICIzMyIgInNxdWFyZSxlZGdlMiJdCglQYWRbLTM5NCAtMzk0IDM5
NCAtMzk0IDEyMjA1IDIwMDIgMTQxNyAiMzMiICIzMyIgInNxdWFyZSxlZGdlMiJdCglFbGVtZW50
TGluZSBbMTE4MjYgMTE4MjYgMTE4MjYgLTExODI2IDEwMDBdCglFbGVtZW50TGluZSBbMTE4MjYg
LTExODI2IC0xMTgyNiAtMTE4MjYgMTAwMF0KCUVsZW1lbnRMaW5lIFstMTE4MjYgLTExODI2IC0x
MTgyNiAxMTgyNiAxMDAwXQoJRWxlbWVudExpbmUgWy0xMTgyNiAxMTgyNiAxMTgyNiAxMTgyNiAx
MDAwXQoJRWxlbWVudExpbmUgWy0xMTgyNiAtMTE4MjYgLTEzMzI2IC0xMzMyNiAxMDAwXQoKCSkK

--MP_/kq2+nsYE1yqObS6n/gxLFse--

- Raw text -