Microprocessor-based system for determining the thickness of conductors on printed wiring boards

Technical Report · Thu Sep 01 00:00:00 EDT 1977

OSTI ID:7211911

Hopwood, J

A microprocessor-based, stored-program controller which incorporates a floating-point arithmetic unit to perform complex mathematical computations has been developed to determine the thickness of conductors on printed wiring boards. Conductor thickness is calculated from measured resistance by means of curve-fitting routines in the stored program. Called a film thickness calculator, the instrument provides a rapid, efficient, in-process, nondestructive means for determining plating thicknesses on the surface and in plated-through holes.

• Research Organization: Sandia Labs., Albuquerque, N.Mex. (USA)
• DOE Contract Number: EY-76-C-04-0789
• OSTI ID: 7211911
• Report Number(s): SAND-77-8038
• Country of Publication: United States
• Language: English

Related Subjects

47 OTHER INSTRUMENTATION
42 ENGINEERING
FILMS
THICKNESS
PRINTED CIRCUITS
THICKNESS GAGES
OPERATION
CALCULATION METHODS
DESIGN
ELECTRIC CONDUCTIVITY
ELECTRIC CONDUCTORS
MICROPROCESSORS
PLATES
DIMENSIONS
ELECTRICAL PROPERTIES
ELECTRONIC CIRCUITS
MEASURING INSTRUMENTS
PHYSICAL PROPERTIES
440300* - Miscellaneous Instruments- (-1989)
420800 - Engineering- Electronic Circuits & Devices- (-1989)