Method for identifying a compound using an acoustic microscope

Details Method for identifying a compound using an acoustic microscope Method for identifying a compound using an acoustic microscope

1997-02-14

1998-11-10

Chapman, John E.

Measuring and testing

Vibration

By mechanical waves

73597, 73599, G01N 2918

Patent

active

058346481

ABSTRACT:
A non-destructive method of identifying a type of compound in a sample using an acoustic microscope, particularly, identifying the type of compound used in an integrated circuit package by comparing attributes of the tested molding compound with known attributes of known compounds to identify the compound being evaluated. The attributes that are compared include voltage, attenuation, peak frequency, average frequency, and the velocity of reflected sound.

REFERENCES:
patent: 5559292 (1996-09-01), Hull et al.
patent: 5627320 (1997-05-01), Moore

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