摘要:
A semiconductor die is formed in a process that forms a hole through the wafer prior to the formation of the contacts and the metal-1 layer of an interconnect structure. The through-the-wafer hole is formed by using a wafer with a crystallographic orientation and a wet etch, such as with ethanol (KOH) or tetramethylammonium hydroxide (TMAH).
摘要:
In a method of reducing the fringing capacitance of a MOSFET, the nitride spacers on the sides of the MOSFET gate are etched away to form trenches, which are plugged to define air spacers.
摘要:
Methods for forming multiple inductors on a semiconductor wafer are described. A plating layer and a photoresist layer are applied over a semiconductor wafer. Recess regions are etched in the photoresist layer using photolithographic techniques, which exposes portions of the underlying plating layer. Metal is electroplated into the recess regions in the photoresist layer to form multiple magnetic core inductor members. A dielectric insulating layer is applied over the magnetic core inductor members. Additional plating and photoresist layers are applied over the dielectric insulating layer. Recess regions are formed in the newly applied photoresist layer. Electroplating is used to form inductor windings in the recess regions. Optionally, a magnetic paste can be applied over the inductor coils.
摘要:
A very, very low resistance micro-electromechanical system (MEMS) inductor, which provides resistance in the single-digit milliohm range, is formed by utilizing a single thick wide loop of metal formed around a magnetic core structure. The magnetic core structure, in turn, can utilize a laminated Ni—Fe structure that has an easy axis and a hard axis.
摘要:
Multiple wafers that each has multiple high-precision circuits and corresponding trim control circuits are batch trimmed in a process where each wafer is formed to include openings that expose trimmable circuit elements that are internal to the circuitry of the high-precision circuits. The high-precision circuits and trim control circuits are electrically activated during the trimming phase by metal traces that run along the saw streets. The method attaches a wafer contact structure to each wafer to electrically activate the metal traces. The method places the wafers with the wafer contact structures into a solution where the exposed trimmable circuit elements are electroplated or anodized when the actual output voltage of a high-precision circuit does not match the predicted output voltage of the high-precision circuit.
摘要:
A silicon-on-insulator (SOI) wafer is formed to have through-the-wafer contacts, and trench based interconnect structures on the back side of the SOI wafer that electrically connect the through-the-wafer contacts. In addition, selected ones of the through-the-wafer contacts bias the bodies of the MOS transistors.
摘要:
An on-chip inductor structure for a DC-DC power regulator circuit merges the switching transistor metallization with the inductor. Thick top level conductor metal that is used to strap the transistor array and to lower its on-state resistance is also used to extend the power inductor into the transistor array. Thus, the structure includes three basic components: a power inductor that spirals around the transistor array, the transistor array itself, and the transistor array metallization that is used to form a distributed inductance situated over the transistor array.
摘要:
An inductor-based integrated MEMS microphone and a method of making the microphone is provided. The microphone structure includes a vibrating inductor that is suspended over another stationary inductor such that the magnetic field induced from one inductor induces an electrical potential across the other. The stationary inductor is embedded in a dielectric material that is etched out over the stationary inductor to provide the cavity over which the vibrating inductor is suspended.
摘要:
The RF impedance of a metal trace at gigahertz frequencies is reduced by forming the metal trace to have a base region and a number of fingers that extend away from the base region. When formed to have a number of loops, the metal trace forms an inductor with an increased Q.
摘要:
An interdigitated semiconductor capacitor with a large number of plates and a capacitance in the micro-farad range is formed on a wafer with only a single lithography step by depositing each odd layer of metal through a first shadow mask that lies spaced apart from the wafer, and each even layer of metal through a second shadow mask that lies spaced apart from the wafer.