摘要:
A system and method for a channel region is disclosed. An embodiment comprises a channel region with multiple bi-layers comprising alternating complementary materials such as layers of InAs and layers of GaSb. The alternating layers of complementary materials provide desirable band gap characteristics for the channel region as a whole that individual layers of material may not.
摘要:
Among other things, one or more techniques for forming a vertical tunnel field effect transistor (FET), and a resulting vertical tunnel FET are provided herein. In an embodiment, the vertical tunnel FET is formed by forming a core over a first type substrate region, forming a second type channel shell around a circumference greater than a core circumference, forming a gate dielectric around a circumference greater than the core circumference, forming a gate electrode around a circumference greater than the core circumference, and forming a second type region over a portion of the second type channel shell, where the second type has a doping opposite a doping of the first type. In this manner, line tunneling is enabled, thus providing enhanced tunneling efficiency for a vertical tunnel FET.
摘要:
A system and method for a channel region is disclosed. An embodiment comprises a channel region with multiple bi-layers comprising alternating complementary materials such as layers of InAs and layers of GaSb. The alternating layers of complementary materials provide desirable band gap characteristics for the channel region as a whole that individual layers of material may not.
摘要:
The present disclosure provides a method of fabricating a semiconductor device. The method includes forming a buffer layer over a substrate, the buffer layer containing a first compound semiconductor that includes elements from one of: III-V families of a periodic table; and II-VI families of the periodic table. The method includes forming a channel layer over the buffer layer. The channel layer contains a second compound semiconductor that includes elements from the III-V families of the periodic table. The method includes forming a gate over the channel layer. The method includes depositing impurities on regions of the channel layer on either side of the gate. The method includes performing an annealing process to activate the impurities in the channel layer.
摘要:
A thin body MOSFET with conducting surface channel extensions and gate-controlled channel sidewalls is described. One embodiment is a MOSFET comprising a semiconductor substrate; a channel layer disposed on a top surface of the substrate; a gate dielectric layer interposed between a gate electrode and the channel layer; and dielectric extension layers disposed on top of the channel layer and interposed between the gate electrode and Ohmic contacts. The gate dielectric layer comprises a first material, the first material forming an interface of low defectivity with the channel layer. In contrast, the dielectric extensions comprise a second material different than the first material, the second material forming a conducting surface channel with the channel layer.
摘要:
A method of forming a portion (10) of a compound semiconductor MOSFET structure comprises forming a compound semiconductor layer structure (14) and an oxide layer (20) overlying the same. Forming the compound semiconductor structure (14) includes forming at least one channel material (16) and a group-III rich surface termination layer (18) overlying the at least one channel material. Forming the oxide layer (20) includes forming the oxide layer to overlie the group-III rich surface termination layer and comprises one of (a) depositing essentially congruently evaporating oxide of at least one of (a(i)) a ternary oxide and (a(ii)) an oxide more complex than a ternary oxide and (b) depositing oxide molecules, with use of at least one of (b(i)) a ternary oxide and (b(ii)) an oxide more complex than a ternary oxide.
摘要:
In one embodiment, a semiconductor device (500) includes a buffer layer (504) formed over a substrate (502). An AlxGa1−xAs layer (506) is formed over the buffer layer (504) and has a first doped region (508) formed therein. An InxGa1−xAs channel layer (512) is formed over the AlxGa1−xAs layer (506). An AlxGa1−xAs layer (518) is formed over the InxGa1−xAs channel layer (512), and the AlxGa1−xAs layer (518) has a second doped region formed therein. A GaAs layer (520) having a first recess is formed over the AlxGa1−xAs layer (518). A control electrode (526) is formed over the AlxGa1−xAs layer (518). A doped GaAs layer (524) is formed over the undoped GaAs layer (520) and on opposite sides of the control electrode (526) and provides first and second current electrodes. When used to amplify a digital modulation signal, the semiconductor device (500) maintains linear operation over a wide temperature range.
摘要翻译:在一个实施例中,半导体器件(500)包括形成在衬底(502)上的缓冲层(504)。 在缓冲层(504)之上形成Al x Ga 1-x As层(506),并且在其中形成有第一掺杂区域(508)。 在Al x Ga 1-x SUB>上形成一个In 1 / x Ga 1-x As As沟道层(512) >作为层(506)。 在In 1 x 1 Ga 1-x N上形成Al x Ga 1-x As层(518) 作为沟道层(512)和Al x Ga 1-x As层(518)具有形成在其中的第二掺杂区域。 具有第一凹陷的GaAs层(520)形成在Al 1 Ga 1-x As层(518)上。 控制电极(526)形成在Al 1 Ga 1-x As As层(518)上。 在未掺杂的GaAs层(520)上和控制电极(526)的相对侧上形成掺杂GaAs层(524),并提供第一和第二电流电极。 当用于放大数字调制信号时,半导体器件(500)在宽的温度范围内保持线性操作。
摘要:
A method of forming a compound semiconductor device comprises forming a gate insulator layer overlying a compound semiconductor substrate, defining an active device region within the compound semiconductor substrate, forming ohmic contacts to the compound semiconductor substrate proximate opposite sides of the active device region, and forming a gate metal contact electrode on the gate insulator layer in a region between the ohmic contacts. The ohmic contacts having portions thereof that overlap with portions of the gate insulator layer within the active device region. The overlapping portions ensure an avoidance of an undesirable gap formation between an edge of the ohmic contact and a corresponding edge of the gate insulator layer.
摘要:
A method of forming a dielectric layer structure on a supporting semiconductor structure having a first surface comprises providing a first beam of oxide; depositing a first layer of oxide on the first surface of the supporting semiconductor structure using the first beam of oxide, wherein the first layer of oxide has a second surface; terminating the first beam of oxide, and concurrently providing a second beam of oxide, a beam of metal and a beam of oxygen, wherein the first and second beams of oxide are separate and distinct beams of oxide; and depositing a second layer of oxide on the second surface simultaneously using the second beam of oxide, the beam of metal, and the beam of oxygen.
摘要:
A gate quality oxide-compound semiconductor structure (10) is formed by the steps of providing a III-V compound semiconductor wafer structure (13) with an atomically ordered and chemically clean semiconductor surface in an ultra high vacuum (UHV) system (20), directing a molecular beam (26) of gallium oxide onto the surface of the wafer structure to initiate the oxide deposition, and providing a second beam (28) of atomic oxygen to form a Ga.sub.2 O.sub.3 layer (14) with low defect density on the surface of the wafer structure. The second beam of atomic oxygen is supplied upon completion of the first 1-2 monolayers of Ga.sub.2 O.sub.3. The molecular beam of gallium oxide is provided by thermal evaporation from a crystalline Ga.sub.2 O.sub.3 or gallate source, and the atomic beam of oxygen is provided by either RF or microwave plasma discharge, thermal dissociation, or a neutral electron stimulated desorption atom source.
摘要翻译:通过在超高真空(UHV)系统(20)中提供具有原子级和化学清洁的半导体表面的III-V化合物半导体晶片结构(13)的步骤形成栅极质量氧化物 - 化合物半导体结构(10) 将氧化镓的分子束(26)引导到晶片结构的表面上以引发氧化物沉积,以及提供原子氧的第二光束(28)以在表面上形成具有低缺陷密度的Ga 2 O 3层(14) 的晶片结构。 当第一个1-2单层的Ga2O3完成时,第二个原子氧束被提供。 通过从结晶Ga 2 O 3或没食子酸酯源的热蒸发提供氧化镓的分子束,并且氧原子束由RF或微波等离子体放电,热解离或中性电子刺激的解吸原子源提供。