As the development of microwave technology and the universal use of VLSI (Very Large Scale Integration) and ULSI (Ultra Large Scale Integration), traditional automatic testing technology for PCB (Printed Circuit Board) is faced with a rigorous challenge.

• 随着微波、毫米波技术的发展以及超大规模集成电路(VLSI)、极大规模集成电路(ULSI)的相继诞生和广泛应用,传统的电路板自动测试技术受到了前所未有的挑战。