METHOD FOR DETECTING CURVE OF IC LEAD

Japanese Patent JPH02290504

A

PURPOSE:To detect the curve of an IC lead from whether or not there are generated pulses and their intervals at a high speed with high accuracy by making a light beam scan a lead arrays and cutting off the laser beam by the leads. CONSTITUTION:When an IC 13 is conveyed in a set direction at a constant speed, the laser beam from a laser light source for flotation detection makes an irradiation scan relatively along a straight line 16B set at a proper position outside a straight lines 16A connecting the tips of the leads in the normal state. At the same time, the laser beam from a laser light source for sinking detection makes an irradiation scan relatively along a straight line 16C set at a proper position inside the straight line 16A. At the same time, the laser beam from the laser light source for flotation detection is photodetected by a photodetecting element for flotation detection without being cut off by the leads 14A - 14D unless the leads 14A - 14D curve upward or downward. At the same time, the laser beam from the laser light source for sinking detection is cut off when striking on the leads 14A - 14D and their shadows appear on the photodetecting element.

JPH1086344	DEVICE AND METHOD FOR INSPECTING PRINTED MATTER
JPS5918409	DEVICE FOR INSPECTING SURFACE OF RED HOT MATERIAL
JP2782759	[Title of Invention] Soldering Visual Inspection Device

KIMURA KAZUMICHI
ANRAKU KATSUHIKO
ODA HIROFUMI

JP11107289A

November 30, 1990

April 28, 1989

Click for automatic bibliography generation  

KIMURA KAZUMICHI
NEW JAPAN RADIO CO LTD

G01B11/24; G01B11/245; H01L21/66; (IPC1-7): G01B11/24; H01L21/66

Nagao Tsuneaki

Previous Patent: METHOD FOR MEASURING FILM THICKNESS

Next Patent: METHOD AND DEVICE FOR MEASURING SECTIONAL AREA