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Machine translation
1. (WO1981000910) INSPECTION OF SOLDER JOINTS BY ACOUSTIC IMPEDANCE
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1981/000910    International Application No.:    PCT/US1980/001270
Publication Date: 02.04.1981 International Filing Date: 22.09.1980
IPC:
G01H 15/00 (2006.01)
Applicants:
Inventors:
Priority Data:
78958 26.09.1979 US
Title (EN) INSPECTION OF SOLDER JOINTS BY ACOUSTIC IMPEDANCE
(FR) CONTROLE DE JOINTS DE SOUDURE PAR IMPEDANCE ACOUSTIQUE
Abstract: front page image
(EN)A method for detection of unacceptable solder joints (6), especially solder pads (9, 10) on printed circuit boards (PCBs) (1), by means of the application of acoustic vibrations over a range of frequencies to the solder joint (6) and observation of the acoustic impedance of the joint (6) as reflected back through the driver (7) to the acoustic generator or through an acoustic detector (8) near the generator to electrical detecting means.
(FR)Procede de detection de joints de soudure inacceptables (6), specialement des supports de soudure (9, 10) sur des plaques de circuits imprimes (PCB) (1), par application de vibrations acoustiques sur une gamme de frequence sur le joint de soudure (6) et observation de l'impedance acoustique du joint (6) reflechie par l'intermediaire du transducteur acoustique (7) au generateur acoustique ou par l'intermediaire d'un detecteur acoustique (8) proche du generateur a des moyens de detection electriques.
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)