Substrate support features and method of application
A method for applying raised features to a semiconductor substrate chuck, each feature acting to space a substrate from the chuck in use, the method comprising the steps of: i) providing an assembly having a carrier layer, a feature adhered to the carrier layer, and a peel-ply layer adhered to the carrier layer such that the feature is enclosed between the carrier layer and the peel-ply layer, ii) removing the peel-ply layer, and iii) adhering the feature to the chuck.
1. An assembly for applying at least one feature to a semiconductor substrate chuck, the at least one feature being raised from the semiconductor substrate chuck to space a substrate from the chuck in use, the assembly comprising:
a carrier layer having first and second major sides,
a feature adhered to the first side of the carrier layer, and
a peel-ply layer adhered to the first side of the carrier layer to enclose the feature between the carrier layer and the peel-ply layer,
wherein the peel-ply layer is removable from the first side of the carrier layer,
wherein upon removal of the peel-ply layer the feature remains supported by the carrier layer,
wherein the feature is applied to a chuck by removal of the peel-ply layer and subsequently adhering the feature to the chuck.
2. The assembly of claim 1 , comprising a layer of adhesive located between the feature and the peel-ply layer, for adhering the feature to the chuck.
3. The assembly of claim 2 , wherein the layer of adhesive comprises a polymer, wherein the polymer is selected from the group consisting of acrylic acid esters, polyurethanes, and silicones.
4. The assembly of claim 1 , further comprising an adhesive backing adhered directly to the first side of the carrier layer.
5. The assembly of claim 1 , wherein the feature comprises a rim which defines a continuous border surrounding additional features when applied to a chuck.
6. The assembly of claim 1 , wherein the feature comprises a ring which defines a closed shape surrounding no other feature when applied to a chuck.
7. The assembly of claim 6 , further comprising a hole in the carrier layer proximate the ring, to align the assembly with a chuck in use.
8. The assembly of claim 7 , further comprising an alignment pin passing through the hole, for engagement with a chuck in use.
9. The assembly of claim 1 , wherein the peel-ply layer comprises woven fabric or synthetic polymer material.
10. The assembly of claim 1 , wherein the feature comprises a polymer material.
11. A method of using the assembly of claim 1 for applying raised features to a semiconductor substrate chuck, each feature acting to space a substrate from the chuck in use, the method comprising the steps of:
i) providing the assembly of claim 1 ,
ii) removing the peel-ply layer, and
iii) adhering the feature to the chuck.
12. The method of claim 11 , wherein step iii) comprises aligning the assembly with the chuck before adhering the feature to the chuck.
13. The method of claim 11 , wherein at least two alignment pins are inserted through the assembly and into the chuck to align the assembly with the chuck.
14. The method of claim 11 , wherein in step iii), adhering the feature to the chuck comprises applying heat and pressure to the chuck and assembly.
15. The method of claim 11 , comprising the additional step of:
iv) cooling the chuck after step iii).
16. The method of claim 11 , comprising a final step of removing the carrier layer from the assembly.
17. A method of making the assembly of claim 1 , comprising the steps of:
bonding together a peel-ply layer, an adhesive layer and a polymeric embossment layer to form a multi-layer structure,
removing portions of the embossment layer and adhesive layer to create at least one feature bonded to the peel-ply layer, and
adhering a carrier layer onto the peel-ply layer to enclose the at least one feature therebetween.
18. The assembly of claim 10 , wherein the polymer material comprises polyetheretherketone or polyimide.