I have the package specs I will add them asap.
As far as I understand the solder mask expansion is the gap between the copper/pad and the solder mask, I don't understand how that should apply to those QFN packages. But from the de-soldered sample I can clearly see a solder mask in between the pins. What I noticed through the componentwizard is that there's some solder mask expansion I just wondered that kind of solder mask expansion seems to be so big that the footprint might end up with no solder mask at all. I tried to desolder an existing device (heated up the PCB) just to see the footprint: So at first I tried to make some kind of PCB library with Altium (Tools -> Component Wizzard -> QFN) however the dual row layout probably cannot be done with it it seems. Alas, Ive been asked to use a chip that doesnt have any alternative package. Im a little intimidated by these little QFN packages. It should be a simple design since it's a one chip solution. Sarang: Many Protel libraries from Altium. So I'd like to understand some kind of video grabber and try to make one by myself. I dont know if its just me, but Ive tried to register on that site twice now, and never been sent the email they promise Im trialling Altium atm (I have about a week left) and one thing that Ive found invaluable is the samacsys plugin - itll create symbols, footprints, and 3D models if they have them (and Ill happily search until I find one they do). I have access to Altium (through my employer). Add - click to open the PCB Model dialog to choose a new footprint model to add for the highlighted schematic component. BGA, and 11 to create a QFN, the Library.
So normally during my daily job I'm a software engineer, recently I decided I would like to swing over to electronic engineering (if possible :-). Other (more detailed) noteworthy differences: Altium Designers footprint wizard has 6 dialog windows to create a. Hi, I've been watching many many videos on youtube and I really like that topic.
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