Drill stack formation

A structure, comprising:

• a plurality of stacks, wherein each stack and its adjacent stack of the plurality of stacks are both coupled with a removable adhesive to an intermediate layer therebetween, wherein each intermediate layer is adapted to prevent burr formation in a hole subsequently drilled through the stack, wherein each stack comprises a plurality of sheets such that each sheet and its adjacent sheet of the plurality of sheets are adhesively coupled to each other with an adhesive layer consisting of the removable adhesive, wherein the adhesive layer is in direct mechanical contact with said each sheet and its adjacent sheet, wherein the removable adhesive consists of a liquid while adhesively coupling said each sheet with its adjacent sheet, and wherein the removable adhesive has a characteristic of being removable if heated to an elevated temperature at which the removable adhesive melts.

The structure of claim 19, wherein the removable adhesive, while adhesively coupling said each sheet with its adjacent sheet, consists of a material selected from the group consisting of water and a water solution.