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How is it optimized for SMT? It seems like the PCB that you mounted it to would need to have a hole or milled pocket in it to accommodate the backside thickness
by durkie 10y ago
How is it optimized for SMT? It seems like the PCB that you mounted it to would need to have a hole or milled pocket in it to accommodate the backside thickness of the CHIP. Not sure how feasible a pocket is, but a hole would mean you then lose all your layers/backside in that area.
- leggomylibro 10y agoThe edges of the board have round plated indents near the through holes, which makes them easier for machines to place and solder.
- duskwuff 10y agoThere are parts on the bottom of the board, including the NAND flash. How does it sit flat?
- Palomides 10y agoyou have a cutout underneath, with only a small overlap for the connection.
- thom_nic 10y agoMilled cut out in the middle of the mainboard seems like an annoying additional cost. Headers that raise the module off the board would be acceptable, except when vertical space is a constraint.
- Palomides 10y agoYou have to mill at least the outline of your board anyway, a little more is trivial.
- durkie 10y agoyeah, it just seems like if it were really optimized for smt, they would have milled the back side of the CHIP and placed the flash et al components in there so that you wouldn't have to find the extra real estate on your own board.
- Scaevolus 10y agoIf you were really optimizing for cost, you wouldn't have a $16 monolithic board in the middle with extra components you don't need. Compared to that, the extra cost of milling the board you're placing it on is minimal.