Post #4253076
2026-07-30 20:53 UTC
You can buy solder spheres on tape-and-reel packaging, but they're expensive as hell. A reel of 20K 0.4mm balls on tape is $450 or 2.25 cents per ball, so for a 400 ball SoM that's $9 just for the solder balls.
For comparison, a jar of 25K 0.4mm SAC305 balls loose is $26.
The only way I see this being viable is if I can figure out a way to place solder spheres from some kind of 3d printed/machined tray rather than having to buy them on tape.
Replies (1)
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@azonenberg@ioc.exchange 2026-07-30 20:55
(I'm ignoring LGA as a possibility because I'm assuming the module will have depopulated sites, back side passives, etc so it'll need the underside clearance of a BGA)