摘要:
Embodiments herein describe techniques for a semiconductor device including a top-gated TFT having high mobility, while keeping the leakage low. Embodiments may include a dielectric layer above a substrate and multiple channel layers above the dielectric layer. For example, a first channel layer including a first material may be above the dielectric layer, and a second channel layer including a second material may be above the first channel layer, wherein the first material may have a lower leakage than the second material, and the second material may have a higher mobility than the first material. Embodiments may further include a source electrode, a drain electrode, and a gate electrode above the second channel layer. Other embodiments may be described and/or claimed.
摘要:
Methods and apparatus to form GaN-based transistors during backend-of-line processing are disclosed. An example integrated circuit includes a first transistor formed on a first semiconductor substrate. The example integrated circuit includes a dielectric material formed on the first semiconductor substrate. The dielectric material extends over the first transistor. The example integrated circuit further includes a second semiconductor substrate formed on the dielectric material. The example integrated circuit also includes a second transistor formed on the second semiconductor substrate.
摘要:
A method for providing a semiconductor structure includes: providing a structure having: layer comprising silicon, such as a layer of silicon or silicon carbide; a bonding structure; and silicon layer, the bonding structure being disposed between the layer comprising silicon and the silicon layer, the silicon layer being thicker than the layer comprising silicon; and, a Group III-V layer disposed on an upper surface of the layer comprising silicon; forming a Group III-V device in the III-V layer and a strip conductor connected to the device; removing silicon layer and the bonding structure to expose a bottom surface of layer comprising silicon; and forming a ground plane conductor on the exposed bottom surface of the layer comprising silicon to provide, with the strip conductor and the ground plane conductor, a microstrip transmission line.
摘要:
A highly reliable semiconductor device suitable for miniaturization and high integration is provided. The semiconductor device includes a first insulator; a transistor over the first insulator; a second insulator over the transistor; a first conductor embedded in an opening in the second insulator; a barrier layer over the first conductor; a third insulator over the second insulator and over the barrier layer; and a second conductor over the third insulator. The first insulator, the third insulator, and the barrier layer have a barrier property against oxygen and hydrogen. The second insulator includes an excess-oxygen region. The transistor includes an oxide semiconductor. The barrier layer, the third insulator, and the second conductor function as a capacitor.
摘要:
Techniques are disclosed for forming monolithic integrated circuit semiconductor structures that include a III-V portion implemented with III-N semiconductor materials, such as gallium nitride, indium nitride, aluminum nitride, and mixtures thereof. The disclosed semiconductor structures may further include a CMOS portion implemented with semiconductor materials selected from group IV of the periodic table, such as silicon, germanium, and/or silicon germanium (SiGe). The disclosed techniques can be used to form highly-efficient envelope tracking devices that include a voltage regulator and a radio frequency (RF) power amplifier that may both be located on the III-N portion of the semiconductor structure. Either of the CMOS or III-N portions can be native to the underlying substrate to some degree. The techniques can be used, for example, for system-on-chip integration of a III-N voltage regulator and RF power amplifier along with column IV CMOS devices on a single substrate.
摘要:
Transistors including doped heteroepitaxial III-N source/drain crystals. In embodiments, transistors including a group IV or group III-V channel crystal employ n+ doped III-N source/drain structures on either side of a gate stack. Lateral tensile strain of the channel crystal may result from lattice mismatch between the channel crystal and the III-N source/drain crystals. In embodiments, an amorphous material is employed to limit growth of III-N material to only a single channel crystal facet, allowing a high quality monocrystalline source/drain to form that is capable of sustaining significant stress. In some embodiments, an n+ III-N source/drain crystal is grown on a (110) or (111) surface of a silicon channel crystal fabricated into a fin structure to form a tensile strained NMOS finFET.
摘要:
Techniques are disclosed for semiconductor device wafer bonding integration. The wafer bonding integration employs device-quality embedded epitaxial layers (e.g., high-quality single-crystal semiconductor material layers) from which one or more devices (e.g., transistors) can be formed, enabling vertical 3D integration schemes. The integration techniques include the ability to produce transistors and back-end stacks on very thin substrates, where the substrate is of device-level quality. The techniques include forming a multilayer substrate including a bulk wafer, a sacrificial layer, and a device-quality layer from which one or more transistors are formed. After back-end processing, the transistors can be bonded to a host wafer that also includes transistors, such that the transistors are stacked in a vertical fashion. After the bonding process, the bulk wafer of the multilayer substrate can be removed from the transistor that was bonded, by at least partially removing the sacrificial layer of the multilayer substrate.
摘要:
Techniques are disclosed for passivation of transistor channel region interfaces. In some cases, the transistor channel region interfaces to be passivated include the interface between the semiconductor channel and the gate dielectric and/or the interface between the sub-channel semiconductor material and isolation material. For example, an aluminum oxide (also referred to as alumina) layer may be used to passivate channel/gate interfaces where the channel material includes silicon germanium, germanium, or a III-V material. The techniques can be used to reduce the interface trap density at the channel/gate interface and the techniques can also be used to passivate the channel/gate interface in both gate first and gate last process flows. The techniques may also include an additional passivation layer at the sub-channel/isolation interface to, for example, avoid incurring additional parasitic capacitance penalty.
摘要:
The electrical and electrochemical properties of various semiconductors may limit the usefulness of various semiconductor materials for one or more purposes. A completed gallium nitride (GaN) semiconductor layer containing a number of GaN power management integrated circuit (PMIC) dies may be bonded to a completed silicon semiconductor layer containing a number of complementary metal oxide (CMOS) control circuit dies. The completed GaN layer and the completed silicon layer may be full size (e.g., 300mm). A layer transfer operation may be used to bond the completed GaN layer to the completed silicon layer. The layer transfer operation may be performed on full size wafers. After slicing the full size wafers a large number of multi-layer dies, each having a GaN die layer transferred to a silicon die may be produced.
摘要:
A semiconductor device includes a layered structure forming multiple carrier channels including at least one n-type channel (140) formed in a first layer (173) made of a first material and at least one p-type channel (150) formed in a second layer (171) made of a second material and a set of electrodes for providing and controlling carrier charge in the carrier channels. The first material is different than the second material, and the first and the second materials are selected such that the n-type channel and the p-type channel have comparable switching frequency and current capability.