Silicon material with quality meeting the requirements of semiconductor devices. Include polycrystalline silicon, monocrystalline silicon, silicon wafers (including slicing, grinding and polishing), epitaxial wafers, amorphous silicon films, microcrystalline silicon films and the like.
Semiconductor IP, what is semiconductor IP mainly refers to the patented technology and non-patented proprietary technology about semiconductors.
IP core is a functional module with intellectual property rights, specific functions and standard interfaces, which can be reused in multiple integrated circuits and is a basic component of system chips. You can simply understand it as a well-designed functional module. The design here has different forms according to the degree of perfection, which are divided into three categories: soft core, solid core and hard core. )
Soft core: understood as code, functional modules are described in hardware description language (for example, a trigger written in VHDL is in text form), without any physical realization information. The characteristics of soft core are strong portability, short design cycle and low cost for users. The disadvantage is that the efficiency of physical realization is uncertain and incomplete, and the protection of property rights is not good)
Solid core: In addition to the code of functional modules, it also includes design links such as gate-level circuit synthesis and timing simulation, which are generally provided to users in the form of gate-level circuit netlist. Hard core can be understood not only as soft core code, but also as the rules between programmer's module design intention and hardware physical implementation.
Hard core: based on physical description and verified by process, the efficiency is guaranteed. It is provided to users (wafer manufacturers) in the form of circuit physical structure mask layout and complete set of process documents.
Semiconductor intellectual property rights are intellectual property rights related to semiconductor intellectual property rights, semiconductor intellectual property rights;
NXP Semiconductor, what is NXP Semiconductor? NXP is a world-famous semiconductor company, which has made achievements in automotive electronics, mobile phone base stations, intelligent identification, set-top boxes and other fields.
What are semiconductors, P-type semiconductors, N-type semiconductors such as germanium, silicon, selenium, gallium arsenide and many metal oxides and metal sulfides? Their conductivity is between conductor and insulator, and they are called semiconductors.
When one side of a semiconductor is made into a P-type region and the other side is made into an N-type region, a thin layer with special properties is formed near the junction, which is generally called a PN junction. The upper part of the figure is divided into carrier diffusion on both sides of the interface between p-type semiconductor and n-type semiconductor (represented by black arrows). The middle part is the formation process of PN junction, which indicates that the diffusion effect of carriers is greater than the drift effect (blue arrow indicates the direction of built-in electric field). The lower part is the formation of PN junction. Represents the dynamic balance of diffusion and drift.
What is a semiconductor? Is the semiconductor conductive? Semiconductor is a solid material, and its conductivity is between metal and insulator. From the internal electronic structure, a semiconductor is similar to an insulator, which contains just enough valence electrons to fill the valence band and is separated from the conduction band above by a forbidden band. The difference between semiconductor and insulator lies in the narrow band gap (this is the key! Nowadays, many materials that were once classified as insulators are gradually moving closer to the semiconductor side. It is precisely because of the development of technology that we have more means to stimulate valence band electrons to cross the forbidden band. For example, the so-called "wide band gap semiconductor" is below 2 ~ 3 electron volts (this figure is uncertain now). Typical semiconductors are mainly bonded by valence bonds, such as crystalline silicon and germanium (this is the most typical semiconductor material, especially silicon, and now it is the main force! )。 Semiconductors conduct electricity through electrons in the conduction band or holes in the valence band ("electrons in the conduction band or holes in the valence band conduct electricity"). The so-called hole is actually the vacancy left by an electron after it leaves, which is an equivalent concept. For the convenience of research, it doesn't actually exist, but it is still an electron. Its conductivity is generally controlled by doping impurity atoms instead of original atoms. If the doped atom has one more valence electron than the original atom, it will produce electron conduction; If the doped impurity atom has one valence electron less than the original atom, hole conduction will occur.
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What are class I semiconductors, class P semiconductors and class N semiconductors? Let me write down what I know!
After the acceptor impurity is added to the pure semiconductor, the acceptor impurity is ionized, which increases the hole concentration and enhances the conductivity of the semiconductor. Semiconductors that mainly rely on hole conduction are called P-type semiconductors. The same is true for N-type semiconductors.
Semiconductor packaging test, what is semiconductor packaging test is packaging test, all electronic components should be packaged, and testing is testing components.
Automotive semiconductor, what is automotive semiconductor? Semiconductor is a substance whose resistivity is between metal and insulator, and its temperature coefficient of resistance is negative.
The resistivity of semiconductor is about10-5 ~107 Ω m at room temperature, and the resistivity index decreases with the increase of temperature.
There are many kinds of semiconductor materials, which can be divided into elemental semiconductors and compound semiconductors according to their chemical composition.
Germanium and silicon are the most commonly used elemental semiconductors; Compound semiconductors include III-V compounds (gallium arsenide, gallium phosphide, etc. ), II-VI compounds (cadmium sulfide, zinc sulfide, etc. ), oxides (oxides of manganese, chromium, iron and copper), solid solutions (gallium aluminum arsenic, gallium arsenic phosphorus, etc.). ) is composed of III-V compounds and II-VI compounds. In addition to the above crystalline semiconductors, there are also amorphous glass semiconductors and organic semiconductors.
Semiconductors are divided into intrinsic semiconductors and impurity semiconductors. Impurity semiconductors are what we use to make transistors. You will study electronics. As the name implies, semiconductor is half conductor and half insulator, that is, current can only pass in one direction, but not in the opposite direction. For example, an iron wire can conduct electricity no matter which direction it is connected to the positive pole, while the semiconductor is connected to the positive pole of the power supply, and the negative pole cannot conduct electricity if it is connected to the positive pole of the power supply, so it is in an insulated state. Silicon and germanium are usually used as semiconductor materials, and silicon is often used. After phosphorus permeates into silicon, it forms a PN junction, which can realize unidirectional conduction. Specifically, it should be used in rectification, amplification and switching circuits. At present, many remote control and sensing technologies are realized by switching circuits. When the conditions are met, the switch is turned on, the corresponding circuit is turned on, and the corresponding action or function occurs.
Micro-semiconductor, what is micro-semiconductor 1? Making devices in the wafer industry will definitely have an impact on the body.
2. The salary depends on what devices you make (such as thin film, lithography, etching, and other devices with different processes).
It also depends on your education and work experience. We can negotiate the price.
3. The interview is hard to say. Generally, large semiconductor companies will have one side, two sides, three sides, and even a written test. It also depends on who is interviewing you. Some supervisors like to talk about professional issues, while others like to talk about family affairs. If you combine them, you must first prepare yourself. English, basic skills (there are almost no Chinese characters in wafer industry), mechanical principle, weak current application.
My personal interview, which lasted for two hours, was basically about industry-related knowledge and solutions to abnormal equipment.
good luck