Method of making carrier head backing plate having...

Details Method of making carrier head backing plate having... Method of making carrier head backing plate having...

2006-05-30

2006-05-30

Wilson, Lee D. (Department: 3723)

Abrading

Abrading process

Side face of disk

C451S288000, C451S388000, C451S398000, C216S088000, C134S025400, C156S345120

Reexamination Certificate

active

07052375

ABSTRACT:
Planarizing machines, carrier heads for planarizing machines and methods for planarizing microelectronic-device substrate assemblies in mechanical or chemical-mechanical planarizing processes. In one embodiment of the invention, a carrier head includes a backing plate, a bladder attached to the backing plate, and a retaining ring extending around the backing plate. The backing plate has a perimeter edge, a first surface, and a second surface opposite the first surface. The second surface of the backing plate can have a perimeter region extending inwardly from the perimeter edge and an interior region extending inwardly from the perimeter region. The perimeter region, for example, can have a curved section extending inwardly from the perimeter edge of the backing plate or from a flat rim at the perimeter edge. The curved section can curve toward and/or away from the first surface to influence the edge pressure exerted against the substrate assembly during planarization. The second surface of the backing plate is a fixed, permanent surface. The backing plate can further include a permanent, low-friction coating over at least a portion of the perimeter region. The bladder is configured to extend over the second surface of the backing plate to form a fluid cell between the bladder and the second surface.

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