Method for inspecting insulating film for film carrier tape for mounting electronic components thereon, inspection apparatus for inspecting the insulating film, punching apparatus for punching the insulating film, and method for controlling the punching apparatus

A method for controlling a punching apparatus for punching an insulating film for film carrier tape for mounting electronic components thereon, the method comprising:

• punching an insulating film for film carrier tape being conveyed;
• subsequently, irradiating the insulating film for film carrier tape being conveyed, with parallel rays having passed through a first polarizing filter;
• causing the rays having passed through or having been reflected by the insulating film for film carrier tape to pass through a second polarizing filter;
• receiving the rays having passed through the second polarizing filter, by means of an image pickup device;
• subjecting the image input to the image pickup device to image processing as a difference of brightness, whereby defects of the insulating film for film carrier tape are detected piece-by-piece;
• and
• stopping operation of the punching apparatus for checking the apparatus when, in each of a sequence of pieces, defects are continuously detected at points falling within certain areas which are substantially equivalent to one another.

A method for inspecting an insulating film for film carrier tape for mounting electronic components thereon, the method comprising:

• punching an insulating film for film carrier tape, and conveying the insulating layer via sprocket holes punched through said insulating film;
• subsequently, irradiating the insulating film carrier tape being conveyed, with parallel rays having passed through a first polarizing filter;
• causing the rays having passed through or having been reflected by the insulating film for film carrier tape to pass through a second polarizing filter;
• receiving the rays having passed through the second polarizing filter, by means of an image pickup device;
• and
• subjecting the image input to the image pickup device to image processing as a difference of brightness, whereby defects of the insulating film for film carrier tape are detected.

A method for inspecting an insulating film for film carrier tape for mounting electronic components thereon, the method comprising:

• providing a punched insulating film for film carrier tape comprising a synthetic resin film, and conveying the insulating film via sprocket holes punched through said insulating film;
• irradiating the insulating film for film carrier tape being conveyed with parallel rays having passed through a first polarizing filter;
• causing the rays having passed through the insulating film for film carrier tape to pass through a second polarizing filter;
• receiving the rays having passed through the second polarizing filter, by means of an image pickup device;
• and
• subjecting the image input to the image pickup device to image processing as a difference of brightness, whereby defects of the insulating film for film carrier tape are detected.