Philips Transistor History

In 1947, the research workers Bardeen, Shockley and Brattain from Bell Labs in the United States discovered the transistor. Philips Research Laboratories in Eindhoven went along with research in semiconductors and succeeded  in 1949 to make their first point contact transistor.

1951 The management of the division thermionic tubes established a separate group for development and production of semiconductors..

1952 The Bell Labs organised the Transistor Technology Symposium in order to share the knowledge with others. They provided insights and Bell provided documentation, Mother Bell's Cookbook was for Philips and many other companies the start in the semiconductor industry.

1953 The Philips Board of Management took the decision to build a large factory for semiconductors in Nijmegen. The new factory opened in 1954 and developed rapidly to be the largest in Europe.

Sales were in the various countries under the locally familiar trademarks like Mullard (UK), Valvo (Germany), RTC (France), Amperex (USA).

irst germanium diode. Type OA50.
 Ca. 1951.
 In 1952 the production was already one million units.
OC50 1953/54. First commercial Philips transistors came on the market.
 The point contact transistors OC50, OC51.


Point contact-transistor

1953/54. First commercial Philips transistors came on the market.
 The germanium junction transistors in a plastic housing. OC10, OC11, OC12.


OC72 Ca. 1954. The germanium junction transistors in a glas housing. OC72, OC71.
Ca. 1954. Development models of the first germanium powertransistors. Types OC15, 100OC. OC15
OC16 Ca. 1956. First commercial  powertransistor in Europe.
 The germanium high-power transistor type OC16.
Germanium high-power transistor.
 Type OC36. In the standard TO-3 case.
 c. 1959
OC44 Transistor line up for the first Philips all-transistor portable radio.
 1xOC44, 2xOC45, 2xOC71, 2xOC72. 1957


All-transistor portable L3X71T

Germanium 'pushed out base' transistor.
 Type OC170. Suitable for high frequenties above 100 MHz. c. 1958


OC200 Silicon transistor.
 Type OC200. c. 1959
OM200, the first commercial Philips IC. 1965. It is an audio amplifier for use in hearing aids and consists of three transistors and two resistors.
 Chip dimensions: 0.75x0.75 mm.
 Package: 2.75x2.8 mm.