Registration method for screen printing and apparatus including elongated screen

A registration method for screen printing using an image pickup apparatus disposed below a print object having a registration part and a screen plate, the screen plate including a screen, arranged over said print object, the screen having a reference mark, said method comprising the steps of:

• detecting a position of said reference mark disposed on the screen by said image pickup apparatus;
• moving a squeegee across the screen, elongating the screen;
• detecting a position of said registration part of said print object by said image pickup apparatus;
• measuring an amount of elongation of the screen;
• inputting the positions of said reference mark and said registration part into a controller which calculates a shift amount between said registration part and said reference mark resulting from the elongation of the screen;
• correcting said shift amount by said amount of elongation of said screen;
• and
• moving at least one of said screen plate and said print object in response to the corrected shift amount to accurately register said screen plate and said print object prior to printing.