Patent ID: 9287225
Filing Date: 2016-03-15
CPC Classification: H01L

Claim Text:
1. A method of manufacturing a semiconductor device, comprising: forming an opening in a first substrate; forming a stopper layer on a surface of the first substrate in a region surrounding the opening; forming a first metal in the opening and on the stopper layer; polishing the first metal with a first chemical mechanical polishing and stopping on the stopping layer to form a first connection electrode in the first substrate; polishing the first substrate using a second chemical mechanical polishing in which a polishing rate of the first metal is less than that of a region surrounding the first connection electrode thereby causing the first connection electrode to protrude from the first substrate; stacking the first substrate and a second substrate that includes a second connection electrode such that the first and second connection electrodes face each other; and diffusion-bonding the first and second connection electrodes to each other by pressing and heating the first and second substrates to a temperature at or below the melting point of the first metal.