公开(公告)号：US10468246B2

公开(公告)日：2019-11-05

申请号：US15889542

申请日：2018-02-06

Applicant: Euclid TechLabs, LLC

Inventor： James E Butler

IPC: H01L21/02 ,  H01L21/32 ,  C30B29/04 ,  H01J37/32 ,  H01L21/66

Abstract: A method of preparing a diamond crystal substrate for epitaxial deposition thereupon of a delta doping layer includes preparing an atomically smooth, undamaged diamond crystal substrate surface, which can be in the (100) plane, by polishing the surface and then etching the surface to remove subsurface damage caused by the polishing. The polishing can include a rough polish, for example in the (010) direction, followed by a fine polish, for example in the (011) direction, that removes the polishing tracks from the rough polishing. After etching the polished face can have a roughness Sa of less than 0.3 nm. An inductively coupled reactive ion etcher can apply the etching at a homogeneous etch rate using an appropriate gas mixture such as using argon and chlorine to remove between 0.1 and 10 microns of material from the polished surface.

公开(公告)号：US20180068850A1

公开(公告)日：2018-03-08

申请号：US15258624

申请日：2016-09-07

Applicant: Euclid TechLabs, LLC

Inventor： James E Butler

IPC: H01L21/02 ,  H01L21/66 ,  H01J37/32

CPC classification number: H01L21/02527 ,  H01J37/32192 ,  H01J37/32201 ,  H01J37/32449 ,  H01J37/32467 ,  H01J37/32724 ,  H01J2237/3321 ,  H01L21/02019 ,  H01L21/02024 ,  H01L21/02376 ,  H01L21/02579 ,  H01L21/02584 ,  H01L21/0262 ,  H01L21/02634 ,  H01L21/02656 ,  H01L22/12 ,  H01L22/26

Abstract: An apparatus and method for creating nanometric delta doped layers in epitaxial diamond includes providing a dummy gas load with gas impedance equivalent to the reactor, and switching gas supplied between the reactor and the gas dummy load without stopping either flow, thereby enabling rapid flow and rapid gas switching without turbulence. An atomically smooth, undamaged substrate can be prepared, preferably in the (100) plane, by etching the surface after polishing to remove subsurface damage. A gas phase chemical getter reactant such as hydrogen disulfide can be used to suppress incorporation of residual boron into the intrinsic layers. Embodiments can produce interfaces between doped and mobile layers that provide at least 100 cm2/Vsec carrier mobility and 1013 cm−2 sheet carrier concentration.

公开(公告)号：US09922823B1

公开(公告)日：2018-03-20

申请号：US15258624

申请日：2016-09-07

Applicant: Euclid TechLabs, LLC

Inventor： James E Butler

IPC: H01L21/02 ,  H01L21/66 ,  H01J37/32

CPC classification number: H01L21/02527 ,  H01J37/32192 ,  H01J37/32201 ,  H01J37/32449 ,  H01J37/32467 ,  H01J37/32724 ,  H01J2237/3321 ,  H01L21/02019 ,  H01L21/02024 ,  H01L21/02376 ,  H01L21/02579 ,  H01L21/02584 ,  H01L21/0262 ,  H01L21/02634 ,  H01L21/02656 ,  H01L22/12 ,  H01L22/26

Abstract: An apparatus and method for creating nanometric delta doped layers in epitaxial diamond includes providing a dummy gas load with gas impedance equivalent to the reactor, and switching gas supplied between the reactor and the gas dummy load without stopping either flow, thereby enabling rapid flow and rapid gas switching without turbulence. An atomically smooth, undamaged substrate can be prepared, preferably in the (100) plane, by etching the surface after polishing to remove subsurface damage. A gas phase chemical getter reactant such as hydrogen disulfide can be used to suppress incorporation of residual boron into the intrinsic layers. Embodiments can produce interfaces between doped and mobile layers that provide at least 100 cm2/Vsec carrier mobility and 1013 cm−2 sheet carrier concentration.