Questions and answers

What is MOCVD reactor?

What is MOCVD reactor?

MOCVD (Metal-Organic Chemical Vapour Deposition) is a technology used to deposit ultra-thin, single crystal layers onto a semiconductor wafer. The MOCVD process also enables the growth of different layers of material on top of each other through the rapid exchange of gases in the reactor.

What is MOCVD process?

Metal organic chemical vapor deposition (MOCVD) is a process used for creating high purity crystalline compound semiconducting thin films and micro/nano structures. Precision fine tuning, abrupt interfaces, epitaxial deposition, and a high level of dopant control can be readily achieved.

What does MOCVD stand for?

metal organic chemical vapor deposition
MOCVD (metal organic chemical vapor deposition) is a technology that is used to deposit very thin layers of atoms onto a semiconductor wafer (wafers are thin disks mostly made of saphire or silicon).

What is the difference between MOCVD and CVD?

MOCVD. Metal organic chemical vapor deposition (MOCVD) is a variant of chemical vapor deposition (CVD), generally used for depositing crystalline micro/nano thin films and structures. Fine modulation, abrupt interfaces, and a good level of dopant control can be readily achieved.

What is Pecvd used for?

PECVD is widely used in the microelectronics and solar cell production, specifically for the deposition of thin films from a mixture of gas-phase species onto a solid substrate [87]. There has been a continuous effort to establish the process conditions to improve the film quality and the rate of deposition.

What is epitaxial layer?

The term epitaxy comes from the Greek roots epi, meaning “above”, and taxis, meaning “in ordered manner”. Epitaxy refers to the deposition of an overlayer on a crystalline substrate, where the overlayer is in registry with the substrate. The overlayer is called an epitaxial film or epitaxial layer.

Which material Cannot be deposited by CVD method?

(*)Which of the following materials cannot be deposited by CVD (Chemical Vapor Deposition) method?…

A Insulators can be deposited by CVD
B Metals can be deposited by evaporation
C Tungsten is usually deposited by evaporation
D Metals can be deposited by sputtering
E Insulators and metals can be deposited by Sputtering

What is the principle of CVD?

Chemical vapour deposition (CVD) is a technique that relies on the formation of a gaseous species containing the coating element within a coating retort or chamber. Alternatively, the gaseous species may be generated external to the coating retort and introduced via a delivery system.

What is the difference between Pecvd and CVD?

A major difference between the films produced by PECVD and CVD is that, the ones produced through PECVD have higher content of hydrogen, which is due to the utilization of plasma in the deposition process [50].

Why do we need epitaxial layer?

For the efficient emission or detection of photons, it is often necessary to constrain these processes to very thin semiconductor layers. These thin layers, grown atop bulk semiconductor wafers, are called epitaxial layers because their crystallinity matches that of the substrate even though…

What causes pseudomorphic epitaxial layer growth?

As the mismatch gets larger, the film material may strain to accommodate the lattice structure of the substrate. This is the case during the early stages of film formation (pseudomorphic growth) and with materials of the same lattice structure.