# What is Trench MOSFET?

## What is Trench MOSFET?

A trench gate MOSFET is basically an attempt to make a complete chip. conduct the current vertically from one surface to the other so as to achieve a high. drive capability. It is realized by packing millions of trenches on a chip, deep. enough to cross the oppositely doped ‘body’ region below the top surface.

## What are the different MOSFET capacitance?

Ciss is the input capacitance, and is the capacitance obtained by totaling the gate-source capacitance Cgs and the gate-drain capacitance Cgd; it is the capacitance of the MOSFET as a whole, as seen from the input.

What is MOSFET output capacitance?

For the power MOSFET, the input capacitance (Ciss=Cgd+Cgs), the output capacitance (Coss=Cds+Cgd) and the reverse transfer capacitance (Crss=Cgd) are important characteristics.

Which part is called as MOS capacitor?

The MOS capacitor or metal-oxide-semiconductor capacitor is a two terminal device consisting of three layers: a metal gate electrode, a separating insulator (often an oxide layer), and a semiconducting layer called the body.

### What is Bvdss?

BREAKDOWN VOLTAGE. Breakdown voltage, BVDSS, is the voltage at which the reverse-biased body-drift diode breaks down and significant current starts to flow between the source and drain by the avalanche multiplication process, while the gate and source are shorted together.

### How do you calculate MOS capacitance?

If you do know some basic quantities such as gate oxide capacitance Cox=Eox/Tox, VTO, length L and width W, then the you may estimate Cgs=(2/3)Cox.

How is MOSFET capacitance measured?

To measure the total gate capacitance (cgg), the low terminal of the measurement is connected to the drain, source and body nodes of the mosfet as shown in acq_ex11_03. png . As this is effectively a two terminal device measurement, this measurement can be made using the LCR instrument alone.

How do you calculate capacitance of a MOSFET?

The capacitance at any forward bias voltage V= Cj0/ sq root ( 1- V/phi) with phi is the built in potential of the junction. These values are given in the . model parameters of the spice model of the transistor.

#### What is MOS capacitance in VLSI?

The acronym MOS stands for Metal oxide semiconductor. An MOS capacitor is made of a semiconductor body or substrate, an insulator and a metal electrode called a gate. Practically the metal is a heavily doped n+ poly-silicon layer which behaves as a metal layer.

#### What is a trench MOSFET?

Trench MOSFET Construction Similar to any other MOSFET, a trench MOSFET cell contains the drain, gate, source, body and the channel regions but exhibits a vertical direction of current flow. All the cells are connected to work in parallel in order to reduce the value of RON. Figure depicts basic device structure for trench MOSFET.

Which MOSFET has lowest on state resistance?

The device trench gate MOSFET has lowest ON state resistance among all the variants of MOS devices. Hence it is considered as most suitable power device for low to medium voltage power applications. The architecture is designed such that it conducts the current vertically from one surface to the other surface.

What is your EPI in a MOSFET?

• R EPI: resistance from the top layer of silicon (epitaxial silicon, also known as epi); epi controls the amount of blocking voltage the MOSFET can sustain. ARTICLES T & M section TERMINOLOGIES Tutorials Jobs & Careers VENDORS IoT Online calculators source codes APP.