Abstract:
큰직경실리콘기판상의 III-N 성장동안발생되는응력/스트레인을수용하고및/또는제어하는 GaN 온실리콘(GOS) 구조체들및 기술들. 실리콘기판의후면측은표준화된직경들및 두께들의기판들을 GOS 응용들에적응하기위해처리될수 있다. 고온에피택셜성장공정들동안의휨 및/또는뒤틀림은 III-N 재료에의해유도되는응력을카운터밸런싱하는방식으로기판에미리응력을주고및/또는응력을흡수하는기판의능력을개선하기위해실리콘기판을사전처리함으로써완화될수 있다. 가공 GOS 기판상에제조되는 III-N 디바이스들은개별기판상에제조되는실리콘 MOS 디바이스들과함께집적될수 있다. 기판탄력을개선하고및/또는 III-N 재료에의해유도되는기판응력을카운터밸런싱하기위해이용되는구조체들은 3D IC의 III-N 및실리콘 MOS 디바이스들을상호연결하는데더 이용될수 있다.
Abstract:
갈륨질화물(GaN) 산화물격리및 기판상에 GaN 트랜지스터구조체들의형성을위한기술들이개시된다. 일부경우들에서, GaN 트랜지스터구조체들은, 벌크실리콘기판상에고-전압 GaN 프런트엔드라디오주파수(RF) 스위치들의시스템-온-칩집적을위해사용될수 있다. 이기술들은예를들어, 기판에다수의핀을형성하는것, 핀들상에 GaN 층을퇴적하는것, GaN 층아래의갭에서각각의핀의적어도일부를산화시키는것, 및하나이상의트랜지스터를 GaN 층상에및/또는 GaN 층으로부터형성하는것을포함할수 있다. 일부경우들에서, GaN 층은복수의 GaN 아일랜드이고, 각각의아일랜드는주어진핀에대응한다. 이기술들은일부경우들에서상대적으로작은폼 팩터, 낮은온 상태저항및 낮은오프상태누설을갖는다양한비평면격리 GaN 트랜지스터아키텍처들을형성하기위해사용될수 있다.
Abstract:
결정질기판위에배치된트렌치층의하나이상의트렌치들로부터연장되는융기형결정질구조체를포함하는결정질헤테로구조체들이설명된다. 일부실시예들에서는, 실리콘기판표면위에계면층이배치된다. 계면층은, 계면층이없었다면기판표면을열화시키고융기형구조체에서더 많은결함들을유도할수 있는성장온도들에서트렌치의저부로부터융기형구조체의성장을용이하게한다. 트렌치층은계면층의일부분을노출시키는트렌치저부를갖고계면층위에배치될수 있다. 트렌치들로부터낮은결함밀도표면들을갖는임의의대형융합형결정질구조체들이과성장될수 있다. III-N 트랜지스터들과같은디바이스들이융기형결정질구조체들상에추가로형성될수 있고, 실리콘-기반디바이스들(예를들어, 트랜지스터들)이실리콘기판들의다른영역들에형성될수 있다.
Abstract:
A high-k gate dielectric interface with a group III-V semiconductor surface of a non-planar transistor channel region is non-directionally doped with nitrogen. In nanowire embodiments, a non-directional nitrogen doping of a high-k gate dielectric interface is performed before or concurrently with a conformal gate electrode deposition through exposure of the gate dielectric to liquid, vapor, gaseous, plasma, or solid state sources of nitrogen. In embodiments, a gate electrode metal is conformally deposited over the gate dielectric and an anneal is performed to uniformly accumulate nitrogen within the gate dielectric along the non-planar III-V semiconductor interface.
Abstract:
III-N semiconductor-on-silicon integrated circuit structures and techniques are disclosed. In some cases, the structure includes a first semiconductor layer formed on a nucleation layer, the first semiconductor layer including a 3-D GaN layer on the nucleation layer and having a plurality of 3-D semiconductor structures, and a 2-D GaN layer on the 3-D GaN layer. The structure also may include a second semiconductor layer formed on or within the first semiconductor layer, wherein the second semiconductor layer includes AlGaN on the 2-D GaN layer and a GaN layer on the AlGaN layer. Another structure includes a first semiconductor layer formed on a nucleation layer, the first semiconductor layer comprising a 2-D GaN layer on the nucleation layer, and a second semiconductor layer formed on or within the first semiconductor layer, wherein the second semiconductor layer includes AlGaN on the 2-D GaN layer and a GaN layer on the AlGaN layer.
Abstract:
Vertical semiconductor devices having selectively regrown top contacts and method of fabricating vertical semiconductor devices having selectively regrown top contacts are described. For example, a semiconductor device includes a substrate having a surface. A first source/drain region is disposed on the surface of the substrate. A vertical channel region is disposed on the first source/drain region and has a first width parallel with the surface of the substrate. A second source/drain region is disposed on the vertical channel region and has a second width parallel with and substantially greater than the first width. A gate stack is disposed on and completely surrounds a portion of the vertical channel region.