In recent years the high efficiency of small and light weight electronic devices has been progressing and the multilayer printed wiring board in connection with this have been progressing as well, becoming many pins o...In recent years the high efficiency of small and light weight electronic devices has been progressing and the multilayer printed wiring board in connection with this have been progressing as well, becoming many pins or a narrow pitch. The build-up board, which makes high-density and narrow pitch possible, is basking in the limelight of this progression trend. (Fig 1) Now, many methods of construction of these build-up boards is advocat-展开更多
文摘In recent years the high efficiency of small and light weight electronic devices has been progressing and the multilayer printed wiring board in connection with this have been progressing as well, becoming many pins or a narrow pitch. The build-up board, which makes high-density and narrow pitch possible, is basking in the limelight of this progression trend. (Fig 1) Now, many methods of construction of these build-up boards is advocat-
