# Who can make boards with UTQFN package: 0.4mm pitch SMT pads **URL:** \ **Category:** PCB Design\ **Created:** [September 10, 2009, 3:22pm UTC](https://community.sparkfun.com/t/who-can-make-boards-with-utqfn-package-0-4mm-pitch-smt-pads/12524 "2009-09-10T15:22:47Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![timg11](https://avatars.discourse-cdn.com/v4/letter/t/d78d45/32.png) [@timg11](https://community.sparkfun.com/u/timg11)\ **Post date:** [September 10, 2009, 3:22pm UTC](https://community.sparkfun.com/t/who-can-make-boards-with-utqfn-package-0-4mm-pitch-smt-pads/12524/1 "2009-09-10T15:22:47Z")
I’m working on an adapter for the UTQFN package. This is a 4mm square QFN package with 28 pins. The pins are on 0.4mm centers, with 0.2mm clearance. The board is 2 layers and 1.3 x 1.7" overall. 0.2mm is 7.87 mils, so it looks like this won’t be manufacturable by BatchPCB since their limit is 8 mils trace width and spacing. It seems so close, but I imagine it would be rejected by their DRC. Has anybody had any experience with any other low-cost PCB manufacturer that can support prototypes with 7mm spacing? ![](https://canada1.discourse-cdn.com/sparkfun/original/2X/b/b61c73c64b1df6326a7d2314de41b7acee09dda7.jpeg)[http://www.synthify.com/39477281/684268 … ackage.jpg](https://community.sparkfun.com/uploads/short-url/pZ1RdcOl2Q74t9jW5FHEBbnrvnx.jpeg) ---
**Author:** ![Gsm\_Man](https://avatars.discourse-cdn.com/v4/letter/g/90db22/32.png) [@Gsm\_Man](https://community.sparkfun.com/u/Gsm_Man)\ **Post date:** [September 10, 2009, 4:00pm UTC](https://community.sparkfun.com/t/who-can-make-boards-with-utqfn-package-0-4mm-pitch-smt-pads/12524/2 "2009-09-10T16:00:05Z")
Both ExpressPCB.com and PCBExpress.com support 6mil traces. I’ve used both companies and both produce high quality boards, but I’ve never had a board made with that thin of a trace. ---
**Author:** ![leon\_heller](https://yyz1.discourse-cdn.com/sparkfun/user_avatar/community.sparkfun.com/leon_heller/32/7602_2.png) [@leon\_heller](https://community.sparkfun.com/u/leon_heller)\ **Post date:** [September 10, 2009, 4:59pm UTC](https://community.sparkfun.com/t/who-can-make-boards-with-utqfn-package-0-4mm-pitch-smt-pads/12524/3 "2009-09-10T16:59:00Z")
PCB Pool can do 6 mil tracks with double-sided boards. Leon ---
**Author:** ![timg11](https://avatars.discourse-cdn.com/v4/letter/t/d78d45/32.png) [@timg11](https://community.sparkfun.com/u/timg11)\ **Post date:** [September 10, 2009, 9:11pm UTC](https://community.sparkfun.com/t/who-can-make-boards-with-utqfn-package-0-4mm-pitch-smt-pads/12524/4 "2009-09-10T21:11:48Z")
Wow - the 0.13 mil difference (between 7.85 mil (.2mm) trace width and spacing and 8 mil width and spacing) results in a 10X increase in cost! If BatchPCB would accept my order, it would cost about $5 US per board. PCBexpress - minimum $95 US for 2 boards. ExpressPCB - no bid - allows proprietary software only PCBpool - Minimum 40 Euro, online calculator give 78 Euro. I’ll keep looking for more reasonable options and post here if I find anything. ---
**Author:** ![leon\_heller](https://yyz1.discourse-cdn.com/sparkfun/user_avatar/community.sparkfun.com/leon_heller/32/7602_2.png) [@leon\_heller](https://community.sparkfun.com/u/leon_heller)\ **Post date:** [September 10, 2009, 9:53pm UTC](https://community.sparkfun.com/t/who-can-make-boards-with-utqfn-package-0-4mm-pitch-smt-pads/12524/5 "2009-09-10T21:53:12Z")
You’ll get several boards from PCB Pool, of course. Leon ---
**Author:** ![olivier\_p](https://avatars.discourse-cdn.com/v4/letter/o/e274bd/32.png) [@olivier\_p](https://community.sparkfun.com/u/olivier_p)\ **Post date:** [September 10, 2009, 10:40pm UTC](https://community.sparkfun.com/t/who-can-make-boards-with-utqfn-package-0-4mm-pitch-smt-pads/12524/6 "2009-09-10T22:40:14Z")
and how about making the footprint with a 8mil wide pad and a 8mil spacing between? On the datasheet, the spacing between the center of the first and last pin of a same side is 94.48mil. With a 8mil pad and 8mil spacing it will become 96mil. A offset of only 1.5mil. Center the chip and it becomes a offset of 0.75mil on either end. Could you live with that? ---
**Author:** ![timg11](https://avatars.discourse-cdn.com/v4/letter/t/d78d45/32.png) [@timg11](https://community.sparkfun.com/u/timg11)\ **Post date:** [September 10, 2009, 10:54pm UTC](https://community.sparkfun.com/t/who-can-make-boards-with-utqfn-package-0-4mm-pitch-smt-pads/12524/7 "2009-09-10T22:54:44Z")
Olivier, That is a really good idea! I think for a few prototypes, there would be no issue with that small offset. I can just create an alternative package on a mil grid rather than the mm grid. Later on, if I ever need to make it a “proper” design, I can just use the other variant of the device. Does anyone disagree or know of any problems with this approach?