摘要:
A compositionally-graded quantum well channel for a semiconductor device is described. A semiconductor device includes a semiconductor hetero-structure disposed above a substrate and having a compositionally-graded quantum-well channel region. A gate electrode is disposed in the semiconductor hetero-structure, above the compositionally-graded quantum-well channel region. A pair of source and drain regions is disposed on either side of the gate electrode.
摘要:
A group III chalcogenide layer for interfacing a high-k dielectric to a III-V semiconductor surface and methods of forming the same. A III-V QWFET includes a gate stack which comprises a high-K gate dielectric layer disposed on an interfacial layer comprising a group III chalcogenide. In an embodiment, a III-V semiconductor surface comprising a native oxide is sequentially exposed to TMA and H2S provided in an ALD process to remove substantially all the native oxide and form an Al2S3 layer on the semiconductor surface.
摘要翻译:用于将高k电介质与III-V半导体表面接合的III族硫属化物层及其形成方法。 III-V QWFET包括栅极堆叠,其包括设置在包含III族硫族化物的界面层上的高K栅极电介质层。 在一个实施方案中,包含天然氧化物的III-V半导体表面依次暴露于在ALD工艺中提供的TMA和H 2 S以去除基本上所有的天然氧化物并在半导体表面上形成Al 2 S 3层。
摘要:
Techniques are disclosed for providing a low resistance self-aligned contacts to devices formed in a semiconductor heterostructure. The techniques can be used, for example, for forming contacts to the gate, source and drain regions of a quantum well transistor fabricated in III-V and SiGe/Ge material systems. Unlike conventional contact process flows which result in a relatively large space between the source/drain contacts to gate, the resulting source and drain contacts provided by the techniques described herein are self-aligned, in that each contact is aligned to the gate electrode and isolated therefrom via spacer material.
摘要:
A semiconductor device comprising a substrate having a transistor that includes a metal gate structure; a first oxide layer formed over the substrate; a silane layer formed on the first oxide layer; and a non-conductive metal oxide layer grown on the metal gate structure, wherein the silane layer inhibits nucleation and growth of the non-conductive metal oxide layer.
摘要:
A microelectronic device includes a metal gate with a metal gate upper surface. The metal gate is disposed in an interlayer dielectric first layer. The interlayer dielectric first layer also has an upper surface that is coplanar with the metal gate upper surface. A dielectric etch stop layer is disposed on the metal gate upper surface but not on the interlayer dielectric first layer upper surface.
摘要:
Surface preparation of a compound semiconductor surface, such as indium antimonide (InSb), with a triflating agent, such as triflic anhydride or a trifluoroacetylating agent, such as trifluoroacetic anhydride is described. In one embodiment, the triflating or trifluoroacetylating passivates the compound semiconductor surface by terminating the surface with triflate trifluoroacetate groups. In a further embodiment, a triflating agent or trifluoroacetylating agent is employed to first convert a thin native oxide present on a compound semiconductor surface to a soluble species. In another embodiment, the passivated compound semiconductor surface is activated in an ALD chamber by reacting the triflate or trifluoroacetate protecting groups with a protic source, such as water (H2O). Metalorganic precursors are then introduced in the ALD chamber to form a good quality interfacial layer, such as aluminum oxide (Al2O3), on the compound semiconductor surface.
摘要翻译:描述了化合物半导体表面如铟锑酸盐(InSb)与三氟甲磺酸酐或三氟乙酰化剂如三氟乙酸酐之类的三氟甲磺酸酯的表面处理。 在一个实施方案中,三氟甲磺酸酯或三氟乙酰化剂通过用三氟甲磺酸酯三氟乙酸酯基团终止表面而钝化化合物半导体表面。 在另一个实施方案中,使用三氟甲磺酸酯或三氟乙酰化剂来将存在于化合物半导体表面上的薄的天然氧化物转化为可溶物质。 在另一个实施方案中,通过使三氟甲磺酸酯或三氟乙酸酯保护基团与质子源如水(H 2 O)反应,钝化的化合物半导体表面在ALD室中活化。 然后将金属有机前体引入ALD室中以在化合物半导体表面上形成良好质量的界面层,例如氧化铝(Al 2 O 3)。
摘要:
A selective spacer for semiconductor and MEMS devices and method of manufacturing the same. In an embodiment, a selective spacer is formed adjacent to a first non-planar body having a greater sidewall height than a second non-planar semiconductor body in a self-aligned manner requiring no patterned etch operations. In a particular embodiment, a margin layer of a particular thickness is utilized to augment an existing structure and provide sufficient margin to protect a sidewall with a spacer that is first anisotropically defined and then isotropically defined. In another embodiment, the selective spacer formation prevents etch damage by terminating the anisotropic etch before a semiconductor surface is exposed.
摘要:
A multi-layered substrate with bulk substrate characteristics and processes for the fabrication of such substrates are herein disclosed. The multi-layered substrate can include a first layer, a second layer and an interfacial layer therebetween. The first and second layers can be silicon, germanium, or any other suitable material of the same or different crystal orientations. The interfacial layer can be an oxide layer from about 5 Angstroms to about 50 Angstroms.
摘要:
Embodiments of the present invention describe a method of fabricating a III-V quantum well transistor with low current leakage and high on-to-off current ratio. A hydrophobic mask having an opening is formed on a semiconductor film. The opening exposes a portion on the semiconductor film where a dielectric layer is desired to be formed. A hydrophilic surface is formed on the exposed portion of the semiconductor film. A dielectric layer is then formed on the hydrophilic surface by using an atomic layer deposition process. A metal layer is deposited on the dielectric layer.
摘要:
A microelectronic device includes a metal gate with a metal gate upper surface. The metal gate is disposed in an interlayer dielectric first layer. The interlayer dielectric first layer also has an upper surface that is coplanar with the metal gate upper surface. A dielectric etch stop layer is disposed on the metal gate upper surface but not on the interlayer dielectric first layer upper surface.