Oxide semiconductor based CMOS circuits are expected to be realized

Professor of the Tokyo Institute of Technology, Hideo Hideo, has developed n-type semiconductors and p-type semiconductors using tin oxide (SnO), and CMOS circuits based on oxide semiconductors are expected to be realized. On March 10, 2010, the university announced the news at a pre-conference press conference of the "2010 Spring Applied Physics Society Academic Lecture" by the Society of Applied Physics.
The Micron Research Laboratory used TFTs based on SnO-based p-type semiconductors in 2008. This time, focusing on the principle that SnO can theoretically become an n-type semiconductor, impurities are added to the p-type semiconductors. Sb) element. It has been confirmed that when the ratio of Sb exceeds about 5%, the material exhibits characteristics of an n-type semiconductor. The university has also produced a homogeneous pn junction based on SnO for both p-type and n-type semiconductors, and has been confirmed to be used as a diode.
According to Hono, using SnO, "closer to the goal of implementing CMOS circuits with oxide semiconductors". According to reports, in addition to CMOS circuits, bandgap can be used as a series connection with a feature of up to 2.0 eV. A short-wavelength optical pn junction of a structured solar cell.
However, the carrier mobility obtained this time is 2.4 cm 2 /Vs for p-type semiconductors and 2.3 cm 2 /Vs for n-types. Although it can be used for TFTs for displays, etc., for displays requiring higher speed operation, It cannot be said that the requirements have been fully met. "The use of oxide semiconductor materials, carrier mobility is difficult to reach 10cm2 / Vs. If higher carrier mobility is required, other materials can be used," said Hirano.

Asic Miner

Application-Specific Integrated Circuit refers to an integrated circuit specifically designed to perform a specific computing task. It is very common to use ASIC for mining in the field of blockchain. This article will analyze the principle of ASIC mining and why it should be anti-ASIC.


For Bitcoin, mining has gone through four stages: CPU, GPU, FPGA and ASIC. GPU is naturally suitable for parallel simple operations, so the execution of SHA256 is much higher than the CPU. FPGA is a programmable hardware, because it has a certain degree of universality, so the unit price will be relatively expensive. ASIC has a large initial design investment, but the unit price will be cheaper after mass production. Therefore, if you can determine that the market size is relatively large, the use of ASIC technology will be the most cost-effective.

This is the basic principle of ASIC.


In a nutshell, mining is running complicated calculations in the search for a specific number. Whether it`s an ASIC miner or a GPU mining rig, mining hardware must run through many calculations before finding that number. In proof of work systems like Bitcoin, the first one to find that number gets a reward - at the time of writing, 12.5 Bitcoins worth around $96,850. That reward will fall to 6.25 Bitcoins in May 2020.

There are so many people and powerful computing systems trying to mine Bitcoin that miner groups form to find that number and share the profit. Even more, the faster your hardware, the more you earn. That`s why people who can afford it opt for ASIC miners because it gives them the greatest chance of earning cryptocurrency in exchange for their investment.

Each cryptocurrency has its own cryptographic hash algorithm, and ASIC miners are designed to mine using that specific algorithm. Bitcoin ASIC miners are actually designed to calculate the SHA-256 hash algorithm. In the case of Litecoin, it uses Scrypt. That means technically they could mine any other coin that`s based on the same algorithm, though typically, people who buy ASIC hardware designed for Bitcoin mine that specific digital currency.

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