Method of manufacturing a plurality of assemblies
View Patent ↗A plurality of assemblies is manufactured. Each assembly comprises a sealing slice that is fixed to a base slice. The plurality of assemblies is manufactured in the following manner. In a preparation step, a stack is formed. The stack comprises a plurality of pre-assemblies. Each pre-assembly comprises a base slice, a sealing slice and a fixing layer provided between the base slice and the sealing slice. The stack further comprises at least one supple buffer layer. The supple buffer layer has a mechanical rigidity, which is substantially less than that of the base slices and that of the sealing slices. The supple buffer layer thus enables to compensate for variations in thickness of the base slices and of the sealing slices. In a fixing step, the stack is pressed which causes the sealing slice of each pre-assembly to be fixed to the base-slice of the pre-assembly.
1. A method of manufacturing a plurality of assemblies, each assembly comprising a sealing slice that is fixed to a base slice, the method comprising: a preparation step, in which a stack is formed, the stack comprising a plurality of pre-assemblies, each pre-assembly comprising a base slice, a sealing slice and a fixing layer provided between the base slice and the sealing slice, the stack further comprising at least one supple buffer layer whose mechanical rigidity is substantially less than that of the base slices and that of the sealing slices, so as to compensate for variations in thickness of the base slices and of the sealing slices; a fixing step, in which the stack is pressed which causes the sealing slice of each pre-assembly to be fixed to the base-slice of the pre-assembly.
2. The method according to claim 1 , wherein the base slice of an assembly is a semiconductor material.
3. The method according to claim 1 wherein the base slice is in the form of a wafer comprising integrated circuits.
4. The method according to claim 1 , wherein in the preparation step, an evacuation plate is placed onto the sealing slice of a pre-assembly and wherein the supple buffer layer is placed between the sealing slice of the pre-assembly and the evacuation plate.
5. The method according to claim 4 , wherein the supple buffer layer is made of a porous material.
6. The method according to claim 5 , wherein the porous material is a fibrous material.
7. The method according to claim 6 , wherein the fibrous material comprises expanded PTFE.
8. The method according to claim 5 , wherein the porous material has a water entry pressure, which is greater than 0.05 bar/60 sec.
9. The method according to claim 1 , wherein the supple buffer layer is chemically inert.