Screaming Circuits: Layout

PROTOTYPE AND SMALL VOLUME
PCB ASSEMBLY MADE EASY

USING THE NEWEST GEN ARM, Part II

I'm a bit behind in my blog work - well, way behind, actually. I started this series back in January with the intro post. Here's where I am right now: I have three different sets of PC boards. One set,... Read more

Using the Newest gen ARM Microcontrollers

I've written a few times about the new Freescale KL03 ARM Cortex M0+ microcontroller. This particular part comes only in very small packages, with the smallest being a 1.6mm x 2mm WLCSP (wafer level, chip scale package) 0.4mm pitch, 20... Read more

Freescale KL03 and PCB123 at 0.4mm pitch

Small component packages seem to be a recurring theme with me. It's understandable, I guess. Super tiny packages are becoming more and more common and we build a lot of product with them. The smallest we've built is 0.3mm pitch.... Read more

VTP - Very Tiny Parts

A while back, I wrote about a new ARM Cortex M0+ chip from Freescale. It's not the first M0+, but I do believe that it's the smallest. I've been checking stock off and on and finally found the smallest package... Read more

Cost Reduction in Design - More Advice for Makers

As a Maker, you really need a decent price, with good quality, and good service. Contrary to what many people think, you don't need to look outside of North America for this. You can keep your gaze West of the... Read more

Choose Your Package Wisely

As I mentioned in my prior blog, there are reasons to consider different packages than just physical size. Sometimes it is just space available on the PC board, but there may be other considerations as well. One of the first... Read more

QFN? QFP? QFwhat?

The QFN (quad flat pack, no leads) has become my favorite integrated circuit package. It's very compact, yet is easier to use than a micro BGA. Micro BGAs of 0.5mm and smaller pitch become a bit more difficult and costly... Read more

Warped PC boards

So... You just got a nice big PC board back from the fab shop. You set one on your desk to admire only to discover that it's warped. What do you do? There are two primary types of causes of... Read more

0.4mm Pitch BGA is Awesome

I recently had a conversation with a friend about 0.4mm pitch BGAs. The specific part is the Freescale KL03 ARM Coretex-M0+ microcontroller in a 1.6mm x 2mm, 04.mm pitch package. That's a 20 ball wafer scale BGA form factor. I... Read more

VLV - Very Large Vias

I recently received a question over on Twitter. Tomaž Šolc, AKA avian2 asked: "@pcbassembly What is your opinion on the "one big plated drill in QFN ground pad" pattern? pic.twitter.com/M9ZLftpuo0" I answered back: "Bad for machine assembly, okay for hand... Read more