Patent ID: 7330582
Filing Date: 2008-02-12
Classification: B23K,H01L

Abstract:
1. A computer readable medium storing a bonding program that detects each one of positions of a plurality of positioning patterns disposed on a chip that is an object of bonding, calculates positions of bonding pads that are in a specified positional-relationship with the plurality of positioning patterns, and performs bonding in calculated positions of said bonding pads, wherein said bonding program comprises: a first reference-image acquisition process that makes an image of a first positioning pattern among a plurality of positioning patterns for a reference chip which is used as a reference for detection of positions of said positioning patterns, thus acquiring an image thus obtained as a first reference-image; a first object-image acquisition process that makes an image of a first positioning pattern for a chip that is an object of bonding, thus acquiring an image thus as a first object-image; a first positional-relationship calculation process that moves a first positioning pattern of said first reference-image and a first positioning pattern of said first object-image in relative terms so as to superimpose both of said images, so that a first positional-relationship which is a relative positional-relationship between a first positioning pattern of said reference chip and a first positioning pattern of said bonding object chip from an amount of said movement is calculated; an inclination-angle calculation process that calculates an inclination-angle of the first positioning pattern of the bonding object chip with respect to the first positioning pattern in the reference chip; a second reference-image acquisition process that makes an image of a second positioning pattern which is in a specified positional-relationship with the first positioning pattern for the reference chip, thus acquiring an image thus obtained as a second reference-image; an imaging-position calculation process that calculates a second positioning pattern imaging-position in which a second positioning pattern is imaged for the chip that is an object of bonding, wherein said second positioning pattern imaging-position is calculated based upon the first positional-relationship, the inclination-angle, a specified inter-pattern positional-relationship and the imaging-position in the first object-image acquisition step; a second object-image acquisition process that makes an image of a second positioning pattern for the bonding object chip in the calculated second positioning pattern imaging-position, thus acquiring the image thus obtained as a second object-image; and a second positional-relationship calculation process that moves the second reference-image end the second object-image in relative terms so as to superimpose the second positioning pattern of the second reference-image and the second positioning pattern of the second object-image, so that a second positional-relationship which is a relative positional-relationship between the second positioning pattern of the reference chip and the second positioning pattern of the bonding object chip from an amount of said movement is calculated; and positions of the bonding pads are calculated based upon the first positional-relationship and second positional-relationship, and bonding is performed.