Alignment table for automatic exposing apparatus

• US 4,970,587 A
• Filed: 11/02/1989
• Issued: 11/13/1990
• Est. Priority Date: 05/15/1989
• Status: Expired due to Fees

• Current Assignee: ORC Manufacturing Co., Ltd.
• Original Assignee: ORC Manufacturing Co., Ltd.
• Inventors: Abe, Chiaki
• Primary Examiner(s): Britton, Howard W.
• Application Number:
  US07/430,263
• Time in Patent Office: 376 Days
• Field of Search: 358/93, 358/101, 358/106, 358/107, 358/225
• US Class Current: 348/94
• CPC Class Codes: G03F 9/00 Registration or positioning of originals, masks, frames, photographic sheets or textured or patterned surfaces, e.g. automatically G03F7/22 takes precedence; preparation of photographic masks G03F1/00; within photographic printing apparatus for making copies G03B27/00
• CPC Class Codes: G03F 9/7088 Alignment mark detection, e.g. TTR, TTL, off-axis detection, array detector, video detection
• CPC Class Codes: H05K 1/0269 for visual or optical inspection
• CPC Class Codes: H05K 2201/09918 Optically detected marks used for aligning tool relative to the PCB, e.g. for mounting of components
• CPC Class Codes: H05K 3/0008 for aligning or positioning of tools relative to the circuit board H05K3/4638, H05K3/4679 take precedence; for manufacturing assemblages of components H05K13/0015

Abstract

An improved alignment table employable for an automatic exposing apparatus used for producing a number of printed wiring boards, wherein the alignment table is designed in a flat and hollow box-shaped configuration comprising an upper plate, a lower plate and side plates, the upper plate and the lower plate are provided with transparent plates at positions located opposite to each other, respectively, and the upper surface of the transparent plate placed on the upper plate is provided in the form of a mat surface.

Claims

1. In an alignment table employable for an automatic exposing apparatus or the like with a work such as a copper-plated laminar plate or the like placed on said alignment table, said alignment table including a plurality of video cameras for photographing one or more position determining reference holes or recognition marks on said work via transparent plates placed on the work and a position indexing unit for deriving the central position of a figure indicative of each of said reference holes or said recognition marks by processing figures of the reference holes or the recognition marks photographed by said video cameras by performing a figure processing so as to index the central position of each of said reference holes or said recognition marks while the positions of photographing of the video cameras are inputted into said position indexing unit, the improvement wherein;

the alignment table is designed in the form of a flat and hollow box-shaped configuration comprising an upper plate, a lower plate and side plates,

said upper plate and said lower plate are provided with two or more transparent plates at positions located opposite to each other, respectively, and

the upper surface of the transparent plate placed on the upper plate is provided in the form of a mat surface.