From Wikipedia, the free encyclopedia. In electronics, a self-aligned gate is a transistor manufacturing feature whereby a refractory gate electrode region of a MOSFET (metal–oxide–semiconductor field-effect transistor) is used as a mask for the doping of the source and drain regions.

What is MOS silicon gate technology?

The Silicon Gate Technology was the world’s first commercial MOS self-aligned-gate process technology. Before this technology, the control gate of the MOS transistor was made with aluminum instead of polycrystalline silicon. In 1968, almost all the integrated circuits sold used bipolar transistors.

What is the difference between metal gate and polysilicon gate technology?

One major difference is between transistors with a metal gate and transistors with a polysilicon gate. When a polysilicon gate is used, polysilicon is deposited before the gate is defined. The source and drain regions are then doped while keeping the channel doping at a different type.

What is sage in semiconductor?

Sage Microelectronics Corporation, founded by a veteran technical team from the silicon valley in 2011, is a leading semiconductor company providing Integrated Circuits (ICs) and solutions for digital storage and data security applications.

What is lightly doped drain?

Modern MOSFETs often incorporate a lightly-doped drain (LDD) region. Due to the presence of the LDD region, these so called LDD MOSFETs have a smaller electric field near the drain region and therefore a reduced hot-carrier effect over the conventional MOSFET [1, 2].

What is the gate technology?

“In a computer, a gate controls the flow of electric current through a circuit. The gate consists of transistors; the transistors are selected by the chip designer from two basic types (PMOS and NMOS transistors) that are found in the ubiquitous CMOS (complementary metal-oxide semiconductor) technology.

Why polysilicon is used instead of metal?

The source and drain region is created using ion-implantation method, which is a very high temperature annealing process. If metal is used as gate then it would melt. The melting point of polysilicon is higher, this is also one of the reason for choosing polysilicon over metal.

What is polysilicon used for?

Polysilicon is a hyper pure form of silicon and is the earth’s second most abundant element. Due to its semiconductor-like material properties, polysilicon is used as feedstock material in most solar energy applications. Polysilicon is an initial building block for the process of manufacturing silicon based Solar PV.

What is LDD in VLSI?

Lightly Doped Drain. To minimize the hot carrier effect, the drain near the channel is doped less compared to the main drain area. This is called Lightly Doped Drain (LDD). To minimize the process complications, both source and drain are doped lightly near the channel region.

What is halo implant?

Definition. halo implantation, used in CMOS fabrication to supress punch-through effect; low energy, low current implantation carried out at large incident angle so that implanted dopants penetrate underneath the edge of the MOS gate stack.

How do gates work?

What is GAA in semiconductor?

Gate-all-around (GAA) transistor technology has emerged as a major new battlefield among global semiconductor companies. GAA refers to a modified transistor structure where the gate contacts the channel from all sides and enables continued scaling.