Patent ID: 8334157
Filing Date: 2012-12-18
Classification: B82Y,H01L,H01S

Abstract:
1. A method of manufacturing a semiconductor device, the method comprising the steps of: treating a semiconductor surface to obtain at least one first region of the semiconductor surface having a first value of average surface lattice parameter and at least one second region of the semiconductor surface having a second value of average surface lattice parameter different from the first value; depositing a second semiconductor layer over the semiconductor surface to a thickness such that self-organised islands form over both the at least one first region and the at least one second region, the self-organised islands over the or each first region having a first average value of a parameter and the self-organised islands over the or each second region having a second average value of a parameter different from the first value; and depositing a capping layer over the second semiconductor layer whereby the self-organised islands form quantum dots, the quantum dots over the or each first region having different properties from the quantum dots over the or each second region; wherein treating of the semiconductor surface includes forming one or more strain-relieving structures being a plurality of pits formed on the semiconductor surface, and adjusting at least one of a depth, shape, sidewall design or distribution pattern on the semiconductor surface, of each of the plurality of pits, and the at least one first region and the at least one second region are incorporated onto a substrate using a single epitaxial deposition process.