Si:
Silicon is used most frequently for the full range o electronic devices. It is
readily available at low cost and has low reverse saturation currents, good
temperature characteristics, and excellent breakdown voltage levels.
Thursday, 23 July 2015
The History of the PCB's
PCB Printed Wiring Board - A Brief History:
The
first PCB patents for "printed wire" were issued in the early 1900's
but PCBs that we would recognize first came into use after World War II. In
1925, Charles Ducas of the United States submitted a patent application for a
method of creating an electrical path directly on an insulated surface by
printing through a stencil with electrically conductive inks. Hence the name
"printed wiring" or "printed circuit." An Austrian
scientist, Dr Paul Eisler, is credited with making the first operational
printed wiring board in 1943. It was used as a replacement for bulky radio tube
wiring.NFL National Fertilizer limited (Panipat) Invites application for Junior Engineer assistant (grade-2)
No. of post: electrical-4/ Mechanical-7/ Instrumentation-9
Eligibility: 3 Year diploma with minimum 50% marks in
Mechanical/Electrical/instrumentation/electronics engineering
Age limit:18 years-30years
Application mode: Online
Last date: 20 august( upto 05:00 PM)
Salary:
9000-16400
Mode of Selection: Written test and Interview
For
more details: Click here
Midhani(Mishra Dhatu Nigam) Invites application for Diploma Engineers
Eligibility: Diploma in Mechanical/ Electrical/ Metallurgy/
Electrical and Electronics Engineering and
2 year experience
Last date: 1 August
For more details: Click here
Subscribe to:
Comments (Atom)