One of the key issues when designing more compact and high-performance electronic devices is "how much heat produced from chips can be dissipated". For this reason, printed circuit boards that effectively dissipates heat are demanded, and "metal boards" with good thermal conductivity came to attention and used as an alternative to conventional glass epoxy circuit boards. Nitto Shinko's aluminum boards are widely used for intelligent power module (IPM) board, which is a "power part" that converts commercial electrical current to direct current, then to variable voltage and frency, combined with the "drive control part" that controls motor speed.
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| Structure | - | SL-AC | SL-AC(L) | SL-AC-H | SL-AC-H(L) | |||
| Copper Foil [μm] | 35 | 105 | 70 | 105 | 70 | |||
| Insulating Layer [μm] | 80 | 125 | 100 | 125 | 150 | 125 | 150 | |
| Aluminum Thickness[μm] | 1.0 | 2.0 | ||||||
| Breakdown voltage | [kV] | 8.0 | 12.0 | 10.0 | 8.0 | 9.0 | 7.5 | 8.0 |
| One-minute withstand voltage | [kV] | 5.5 | 9.0 | 6.5 | 7.0 | 4.5 | 5.0 | |
| Dielectric constant (1MHz) | - | 4.5 | 4.6 | 7.2 | 7.5 | |||
| Thermal resistance | C/W | 0.52 | 0.80 | 0.48 | 0.55 | 0.65 | 0.35 | 0.43 |
| Thermal conductivity | W/mk | 1.0 | 1.8 | 1.9 | 3.5 | |||
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