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A comment on A $1, Linux-Capable, Hand-Solderable Processor. Parent comment

Re:A $1, Linux-Capable, Hand-Solderable Processor by makomk on Tuesday September 18, 2018 @01:01PM (#18016990)
I don't think manufacturers offer QFN packages in this high a pin count. Not sure why. Presumably there's some kind of manufacturability issue that TQFP doesn't suffer from. (The much smaller PMIC that's designed to be partnered with this is QFN though.)
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Re:A $1, Linux-Capable, Hand-Solderable Processor by fermienrico on Tuesday September 18, 2018 @02:18PM (#18017766)
Wirebonding a massive footprint is less yielding. Also the large packages take up more room on JEDEC processing trays in semiconductor manufacturing and leads to higher costs due to low chip/tray throughput. Furthermore, warpage of large packages is of concern and so is inability to ship in Tape & Reel.

All serious stuff in IOT is WLCSP which has an insanely small footprint __and__ z-height.

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