Patent ID: 7941237

Claim:
A process chamber for processing large substrates, comprising: a pallet for supporting and protecting one large substrate during processing in said process chamber, said pallet comprising: one large substrate; a pallet top, wherein said pallet top comprises (i) a multiplicity of contactors for making electrical contact with a multiplicity of test pads on the surface of said one large substrate, wherein there is a predetermined one-to-one mapping between said contactors and said test pads; (ii) means for detecting the locations of at least two alignment marks on the surface of said one large substrate; (iii) means for determining a required displacement vector for said pallet top with respect to said one large substrate, said required displacement vector being defined as that displacement of said pallet top with respect to said one large substrate that would approximately center said contactors with respect to said test pads, consistent with said predetermined one-to-one mapping between said contactors and said test pads; and (iv) means for precisely displacing said pallet top with respect to said pallet bottom, according to said required displacement vector; a pallet bottom; wherein said one large substrate is clamped between said pallet top and said pallet bottom, and said pallet bottom comprises means for preventing relative motion between said one large substrate and said pallet bottom whenever said pallet is assembled; and a port configured to accommodate passage of said pallet into and out of said processing chamber.