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| Both sides previous revisionPrevious revisionNext revision | Previous revisionNext revisionBoth sides next revision | ||
| decap:epoxy_acid [2019/12/07 23:21] – [Table] mcmaster | decap:epoxy_acid [2021/12/29 20:01] – mcmaster | ||
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| Above: HSS endmills are relatively inexpensive (above were about $3 each) and work reasonably well. They may be a better option than more expensive endmills that last slightly longer | Above: HSS endmills are relatively inexpensive (above were about $3 each) and work reasonably well. They may be a better option than more expensive endmills that last slightly longer | ||
| + | |||
| + | 2021-12-29: McMaster has recently been using RFNA (instead of WFNA) which seems to be much faster on epoxy. Fast enough that I'm no longer pre-milling chips. This tends to be faster overall and removes risks of milling (damaging bond wires, etc) | ||
| General recommendation for pre-milling packages | General recommendation for pre-milling packages | ||
| - | ^ Package | + | ^ Package |
| - | | PDIP8 | 0.3" | + | | PDIP8 | 0.3" |
| - | | PDIP18 | + | | PDIP18 |
| - | | PDIP28 | + | | PDIP28 |
| - | | PDIP28 | + | | PDIP28 |
| - | | PDIP40 | + | | PDIP40 |
| - | | TO-99 | | Ceramic: 0.11\\ Epoxy: 0.07 peak | 0.31" | + | | TO-99 | | Ceramic: 0.11\\ Epoxy: 0.07 peak | 0.31" |
| Don't cool the bit. Heat weakens epoxy. You will go through bits relatively quickly. Carbide bits do last longer, haven' | Don't cool the bit. Heat weakens epoxy. You will go through bits relatively quickly. Carbide bits do last longer, haven' | ||
| Line 29: | Line 31: | ||
| * A few chips have higher bond wires than typical | * A few chips have higher bond wires than typical | ||
| + | Suppliers: | ||
| + | * 1/8 / 3 mm | ||
| + | * https:// | ||
| + | * 1PCs 1/ | ||
| + | * 2019-12-26: qty 10 for $20.93 shipped ($2.09 each) | ||
| + | * 5Pcs/Pack Carbide Flat End Mill 4-Flute Mentalworking CNC Tool 3mm Cutting Dia | ||
| + | * 2019-12-26: qty 5 for $15.25 ($3.05 each) | ||
| + | * https:// | ||
| + | * 3mm Carbide End Mill 4-F CNC Milling Cutter Bit 3*4*50L 55° VHM coating *5pcs | ||
| + | * 2020-09-06: qty 15 for $43.24 ($2.88 each) | ||
| ====== Copper bond wires ====== | ====== Copper bond wires ====== | ||