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Making an Integrated Circuit

Making an Integrated Circuit

A Technology, Information Technology and Gadgets podcast

Good podcast? Give it some love!
Making an Integrated Circuit

Making an Integrated Circuit

Episodes
Making an Integrated Circuit

Making an Integrated Circuit

A Technology, Information Technology and Gadgets podcast
Good podcast? Give it some love!
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Episodes of Making an Integrated Circuit

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Let's go inside an Intel 4004 microprocessor to see an individual transistor

Jul 24th, 201713s

To make this transistor, first oxide then nitride layers are grown

Jul 24th, 201711s

A shadow mask then exposes a photographic emulsion

Jul 24th, 201712s

Exposed nitride is then etched away

Jul 24th, 20177s

Oxygen reacts with the Si to grow more oxide

Jul 24th, 201712s

By heating in silane, polycrystal Si is then grown

Jul 24th, 20174s

A stripe is exposed in a second photographic emulsion

Jul 24th, 201710s

Exposed polycrystal Si is etched away leaving the transistor gate

Jul 24th, 20179s

Phosphorus ions then penetrate thin oxide to create the source and drain

Jul 24th, 201712s

Heating in oxygen grows an insulating coat on the gate

Jul 24th, 20176s

A third photographic emulsion defines windows above the source and drain

Jul 24th, 201710s

Openings are then etched in the exposed oxide

Jul 24th, 20177s

Metal is sprayed on to the surface

Jul 24th, 20173s

A fourth photographic emulsion is patterned

Jul 24th, 201710s

Unwanted metal is etched away completing the transistor

Jul 24th, 20179s

And finally, here is the circuit symbol for the transistor

Jul 24th, 20178s

This podcast is drawn from the Virtual Lab presentations of WeCanFigureThisOut.org. The copyrighted material of this site was developed under funding from National Science Foundation CCLI, NIRT, MRSEC and NUE programs. This project is led by John C. Be

Jul 24th, 201733s
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All of the scenes together

Jul 24th, 20173m 9s
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