Patent ID: 7426952

Claim:
A bonding apparatus for electrically joining a first circuit bearing substrate having a first array of conductive surface traces to a second circuit bearing substrate having a second array of conductive surface traces, the bonding apparatus comprising: a fixture having a fixture surface, the fixture surface having a first portion and a second portion; first and second bond shoes, each bond shoe having a working surface with lateral dimensions that are equal to or greater than lateral dimensions of at least one array of conductive surface traces on a first circuit bearing substrate supported on the first portion of the fixture surface; a first tool press having a shaft and an attachment device secured to the shaft of the first tool press. the attachment device being configured to receive a portion of the first bond shoe, the attachment device being connected to the first bond shoe by a mechanical linkage to enable adjustment of an angle of the first bond shoe with reference to the first portion of the fixture surface, the first tool press being operable to press the first bond shoe toward the first portion of the fixture surface selectively; and a second tool press having a shaft and an attachment device secured to the shaft of the second tool press, the attachment device being configured to receive a portion of the second bond shoe, the attachment device being connected to the second bond shoe by a mechanical linkage to enable adjustment of an angle of the second bond shoe with reference to the second portion of the fixture surface, the second tool press being operable to press the second bond shoe toward the second portion of the fixture surface selectively, the first tool press and the second tool press being configured to drive the first bond shoe and the second bond shoe independently of one another; the first tool press is configured to pressurize fluid to drive the first bond shoe toward the first portion of the fixture surface with a force, which is sufficient to tack a second circuit bearing substrate having a second array of conductive surface traces to the first circuit bearing substrate with a joining layer; and the second tool press is configured to pressurize fluid to drive the second bond shoe toward the second portion of the fixture surface with a force, which is greater than the force generated by the first tool press and which is sufficient to bond the second circuit bearing substrate to the first circuit bearing substrate with the joining layer after the second circuit bearing substrate has been tacked to the first circuit bearing substrate with the joining layer.