JPH0260859U

JPH0260859U -

Info

Publication number: JPH0260859U
Application number: JP14058188U
Authority: JP
Priority date: 1988-10-27
Filing date: 1988-10-27
Publication date: 1990-05-07

Description

[Brief explanation of drawings]

第１図は本考案の第１の実施例のブロツク図、
第２図ａ及びｂは第１図のブロツクの動作を説明
するための正常及び欠陥を有するスルーホール近
傍の断面模式図、第３図ａ及びｂは第２図ａ及び
ｂに対応するスルーホールの２値化画像図、第４
図ａ〜ｃは本考案の第２の実施例のブロツク図、
正常及び欠陥を有するスルーホール近傍の断面模
式図、第５図は従来の印刷配線板試験装置の一例
のブロツク図である。１……論理回路部、２……表示部、４……演算
部、５……記憶部、６ａ……光照射器、６ｂ……
ＣＣＤカメラ、７……被試験印刷配線板、８……
検査テーブル、９……鏡面部、１０……ＸＹ軸駆
動回路、１０ａ……ベルトコンベヤ駆動回路、１
１……スルーホール、１２……メツキ層、１３…
…ベルトコンベヤー、Ｐ……欠陥部、Ｑ……欠陥
部対応画像。 FIG. 1 is a block diagram of the first embodiment of the present invention.
Figures 2a and b are schematic cross-sectional views of the vicinity of normal and defective through-holes to explain the operation of the block in Figure 1, and Figures 3a and b are through-holes corresponding to Figures 2a and b. Binarized image diagram, 4th
Figures a to c are block diagrams of a second embodiment of the present invention;
FIG. 5 is a schematic cross-sectional view of the vicinity of normal and defective through-holes, and is a block diagram of an example of a conventional printed wiring board testing apparatus. 1...Logic circuit section, 2...Display section, 4...Calculation section, 5...Storage section, 6a...Light irradiator, 6b...
CCD camera, 7...Printed wiring board to be tested, 8...
Inspection table, 9...Mirror surface section, 10...XY axis drive circuit, 10a...Belt conveyor drive circuit, 1
1...Through hole, 12...Metted layer, 13...
...Belt conveyor, P...Defective area, Q...Image corresponding to defective area.

Claims

[Scope of utility model registration request]

An inspection table that places a printed wiring board under test provided with through holes on a mirror surface, a light irradiator that irradiates inspection light onto the through holes diagonally from above, and a light irradiator that irradiates the inspection light from the through holes or the inside of the through holes. a light receiver that inputs the transmitted light that has passed while being reflected; a drive mechanism that relatively drives the optical portion of the light receiver, the light irradiator, and the inspection table; and a binarization of the detection signal of the light receiver. A printed wiring board testing apparatus comprising: a logic circuit unit that processes the image signal and outputs an image signal to a display unit in accordance with the position of the irradiation point controlled by the drive mechanism.