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You can refer to the following table.
| Ball Dia. | Reduction | Land Pattern Density Level | Land Dia. | Land Variation |
| 0.15 | 15% | C | 0.13 | 0.15-0.10 |
| 0.20 | 15% | C | 0.17 | 0.20-0.14 |
| 0.25 | 20% | B | 0.20 | 0.20-0.17 |
| 0.30 | 20% | B | 0.25 | 0.25-0.20 |
| 0.35 | 20% | B | 0.30 | 0.35-0.25 |
| 0.55 | 25% | UNA | 0.40 | 0.45-0.35 |
Lee mas: Asamblea de PCB BGA
#Diseño de PCB
La nota de la asamblea dice: Hornee los PCB desnudos en un horno limpio y bien ventilado antes del ensamblaje a 125 * C durante 24 horas. ¿Por qué es esto necesario??
Quiero hacer una placa PCB de bricolaje en casa., pero la materia prima es limitada. ¿Puedo pegar pegamento caliente para cubrir una placa PCB?? ¿Es recomendable hacer eso??
Quiero decir, Los auriculares o audífonos son capaces de reducir el ruido de fondo ambiental.. ¿Se puede realizar mediante diseño de circuito u otros enfoques??
Mercados
tarjeta de circuito impreso
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