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Home > All Images > 1991 > June > 12 Jun 1991

Images Dated 12th June 1991

Choose from 22 pictures in our Images Dated 12th June 1991 collection for your Wall Art or Photo Gift. All professionally made for Quick Shipping.

Macrophotograph of printed circuit board Featured 12 Jun 1991 Print

Macrophotograph of printed circuit board

Macrophotograph of the surface of a printed circuit board. The olive green areas are copper conducting tracks of the circuit, covered with a protective varnish. The elongated brown areas are bare copper connectors, awaiting soldering to connectors on a microprocessor chip. The blue circles are connection points for other components such as resistors and capacitors, and to other parts of the product such as switches and dials. Printed circuits such as this are manufactured by a process involving photographic printing and chemical etching of unwanted areas. Magnification: x1.5 at 6x6cm size