In LED applications, the demand for 4-inch sapphire substrates is rising rapidly, and it is expected that the growth rate will be over 30% this year and next. However, due to the sapphire manufacturer's production conversion from 2 inches to 4 inches, it is necessary to continue to expand production capacity due to the tight supply of 4-inch sapphire crystal rods and graphic sapphire substrates (PSS).
Zhejiang Dongjing Bolante Optoelectronics Co., Ltd. (hereinafter referred to as “Dongjing Bolantâ€) has been committed to the research and development and production of sapphire substrates since 2012, and introduced the high-efficiency sapphire graphic substrate technology to realize the industrialization of PSS. To meet the demand for high-brightness blue LED chips for PSS, it is one of the few companies in China to master the production technology of large-size sapphire substrate materials. Most of the PSS currently on the market is a 2-inch micron-sized PSS. The 4-inch micro-nano PSS of Dongjing Bolante has the advantages of graphic size, good shape consistency, high density and low defects.
In the 2014 (5th) High-tech LED Golden Globe Awards - Good Product Awards, Dongjing Bolant will carry LEDs with a 4-inch graphic sapphire substrate (PSS) model: D4(N)PSS.
Liu Jianzhe, deputy general manager of Dongjing Bolande, told reporters that in the current market where PSS is mostly 2 inches micron PSS, the East Crystal Boland 4 inch graphic sapphire substrate is quite competitive. The advanced technology is to use a high-density photoresist pattern mask or a self-developed SiO2 nanosphere as a mask (the invention patent: CN1022147443B), which is prepared by ICP dry etching technology. 4-inch hemispherical or triangular pyramidal PSS in nanoscale pattern size.
The East Crystal Bolander 4-inch sapphire substrate is excellent in technical parameters and use. The main performance indicators of the 4-inch product are as follows: 1. Graphical appearance: triangular cone 2. Pattern size: a width 2.7 microns high 1.7 microns b width 500 Nano high 300 nm 3. Uniformity: less than 3% 4. Graphic defects: <30 ea, 100-300 micron <3 ea, 300 micron or more 0 ea below 100 microns.
The traditional micro-PSS can no longer meet the requirements of further improving the light extraction efficiency of LED devices, and the LED industry's large-scale wafer era is also coming. Dongjing Bolante R&D team has 4 inch micro-nano PSS preparation technology with independent intellectual property rights, which effectively fills the blank of domestic large-size sapphire products. Since the establishment of the company at the end of 2012, it has been widely praised by LED epitaxial chip customers at home and abroad.
At present, Dongjing Bolant has reached 150,000 pieces of 2 inch PSS per month and 20,000 pieces of 4 inch PSS. It is estimated that by the end of 2014, the production of 4-inch PSS will reach 50,000. Dongjing Bolante will also play an early start, the leading edge of technology, so that product technology is at the leading level at home and abroad.
At present, the 2014 (5th) High-tech Golden Globe Award - the annual LED good product selection has entered the WeChat voting stage: August 8 - September 30.
If you have already paid attention to the official WeChat LED, please click on the menu bar "Golden Ball Award - I want to vote" under the official WeChat of Gaogong LED Network to vote.
If you have not paid attention to the high-tech LED WeChat, please pay attention to the official WeChat (micro-signal: weixin-gg-led) of Gaogong LED network, and then click on the menu bar "Golden Ball Award - I want to vote" under the official WeChat LED official website. .
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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