The end of the Second World War, Bell Labs began a research project, the goal is to develop an even smaller and more powerful, faster and reliable device to replace the vacuum tube.This plan gave birth to the invention of the transistor - which also makes the electronics industry with breakthrough changes. Bell Labs three systems engineer Walter H. Brattain, John Bardeen and William Shockley Heli operating transistor research and development, addition with agitation creative, they try to validate many theories and assumptions, their research has been hailed as the science, technology hit the entirethe community has a far-reaching impact and contribution. In the R & D process, they recognized the importance of inter-reference between the various disciplines, and therefore got a chemist and metallurgist, theory and practice both physicists to join this team, via their commonefforts, and finally create a successful indispensable necessity of the development of the electronics industry - high-purity single crystal semiconductor. December 23, 1947, developed by Bell Labs transistor replaced the vacuum tube, as a phone adapter relays, the advantage of a smaller, more reliable, and low cost. Transistors not only lead the revolution in solid-state physics, gave birth to the electronic semiconductor industry throughout the world today, and also contributed to the telecommunications computer industry, medicine, space exploration and other areas of dramatic change, and become another focus of public attention. In 1947, the manufacturing of transistor manual assembly is still stuck in the Bell Labs. Allentown Western Electric Company in 1951 to promote the production of transistors to be mechanized because of the distance of the transistor was invented only a few years time, the pace of R & D To cope with mechanized production process with difficulty, but finally the completion of a long life cycle, low cost, high purity and crystal perfection transistors. October 1, 1951, the first mass-produced transistor factory was born in Pennsylvania Industrial Zone.Throughout the 1950s, the the Pennsylvania Industrial Area engineer and operator are constantly being invented and equipment needed in the design and manufacture of transistors. 6000 transistors in 1951 has been successfully created, it can be said to have laid the foundation for future technology industry can continue to progress.