Patent ID: 7192487

Claim:
A semiconductor substrate processing chamber and accessory attachment interfacial structure, comprising: a body sized and shaped to engage with and between a semiconductor substrate processing chamber and an accessory attachment which is exposed to the processing chamber effective to space the processing chamber and accessory attachment from one another, the body having first and second faces; the body comprising an external perimeter extending between the first and second faces; the body comprising a volume in at least one cross sectional region which extends to diametrically opposing portions of the perimeter along a shortest distance between the processing chamber and accessory attachment when said body is engaged with and between said processing chamber and accessory attachment, at least a majority of said cross sectional region constituting a mass of substantially non-metallic and thermally insulative material, the mass of material being sufficient to effectively reduce heat transfer between the semiconductor processing chamber and the accessory attachment when so engaged than would otherwise occur in the absence of said mass of material when so engaged; and the body comprising a plurality of openings which extend through the thermally insulative material, and comprising load bearing plugs received within at least some of the openings in the thermally insulative material, the load bearing plugs having greater compression strength than the thermally insulative material, at least some of the load bearing plugs being entirely solid and at least some including a hollow portion.