In December, 1947 their experiment
with two gold contacts applied to the germanium crystal produced an output
signal power greater than the input signal. Thus the first transistor
technology developed was known as point contact device and this technology was
regulated by higher performance types. This was first reported in June, 1948.
Point contact transistor
Later the limitations of point
contact device, made Shockley alone, to invent junction transistor which
dominated the point contact device and is easy to manufacture.
The trading of transistors started
from 1950’s and first commercial transistor was used in telephonic equipment
and military computers in 1952. In 1953 transistor is used in deaf aid, a
medical device. This effective rise of transistor technology is mainly due to
donation and encouragement of many companies including Bell Labs, Motorola,
Philco, Raytheon, RCA, Sylvania and Texas Instruments.
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