What is the function of the engraver? What is a lithography machine used for and how does it work?

Generally speaking, it means that the information you want to feedback is deducted twice, which means that you want to process it twice.

In fact, this kind of words are the same as high-lithography machines, this kind of thing.

Lithography machine (mask aligner) is also known as: mask aligning machine, system, lithography system, etc., is the core equipment for manufacturing chips. It uses a technology similar to that of printing, and prints the fine graphics on the mask through the light to the silicon wafer.

Brief steps for the production of integrated circuits:

A stencil is used to remove the protective film on the surface of the wafer.

The wafer is soaked in a corrosive agent, and the part that has lost the protective film is corroded away to form a circuit.

Wash away impurities remaining on the surface of the wafer with pure water.

Among them, the first machine is a device that uses ultraviolet light to remove the protective film on the surface of the wafer through the template.

A wafer can make dozens of integrated circuits, which are divided into two types according to the template ** machine:

The template is the same size as the wafer, and the template does not move.

The template is the same size as the integrated circuit, and the template moves with the focus part of the machine.

Among them, the template moves with the machine, and the template is unchanged from the center of the machine, and the center part of the focusing lens can always be used to obtain higher accuracy.

1. Use.

The lithography machine is one of the core equipment of chip manufacturing, which can be divided into several types according to the use: there are lithography machines for the production of chips; There are lithography machines for encapsulation; There are also projection lithography machines for LED manufacturing.

The lithography machine used to produce chips is China's biggest shortcoming in semiconductor equipment manufacturing, and the high-end lithography machines required by domestic wafer factories are completely dependent on imports.

Second, the working principle.

In the process of processing the chip, the lithography machine transmits the beam through a series of light source energy and shape control means, passes the beam through the mask with the circuit diagram, compensates for various optical errors through the objective lens, scales down the circuit diagram and maps it to the silicon wafer, and then uses chemical methods to develop the circuit diagram engraved on the silicon wafer.

The general lithography process needs to go through the silicon wafer surface cleaning and drying, priming, spin coating photoresist, soft drying, alignment, post-drying, development, hard drying, laser etching and other processes. After a photolithography of the chip, it can continue to be glued,**. The more complex the chip, the more layers of the circuit diagram, and the more precise the control process is required.

What exactly is a chip nanolithography machine and how does it work? Today is a long time to see.

Generally speaking, lasers are used. For example, to etch the pattern on the glass, the general steps are: cleaning the glass, drying, coating the glass with a photoresist (that is, the photoresist has positive and negative characteristics), drying (curing), ** (there are many ways, such as laser direct writing, through the mask template at the same time, etc.), degumming (photochemical changes occur after the photoresist **, and there are many ways to remove the glue, such as putting it in the etching agent, if you use positive glue, the place where the light is exposed will be dissolved, and the photoresist will be retained where there is no light. At this point, the required pattern has been etched on the photoresist), cleaning, and transfer (there are more methods, such as ion beam bombardment, the photoresist and the glass are bombarded at the same time, and after the photoresist is bombarded, the exposed glass is also bombarded, and the pattern on the photoresist is transferred to the glass).

In fact, the method and specific steps of lithography are quite complex, and the requirements for the environment are also very high, and the above are just basic steps to give you a general understanding.

The satellite television receiving system is composed of: parabolic antenna, feed, high-frequency head, satellite receiver composed of a complete set of satellite receiving station.

1. The parabolic antenna is to reflect and converge the satellite signal energy of the starry sky into a focal point.

2. The feed is to set up a horn at the focus of the parabolic antenna to gather satellite signals, which is called the feed, which means the source of feeding energy, and requires that all the energy gathered to the focus be collected. Feed-forward satellite receiving antennas are basically fed with large open angular ripples.

3. The high-frequency head (LNB, also known as the frequency reducer) is to reduce the frequency and amplify the satellite signal sent by the feed, and then transmit it to the satellite receiver. The lower the noise level of the high-frequency head, the better.

4. The satellite receiver demodulates the satellite signal transmitted by the high-frequency head, and demodulates the satellite TV image signal and sound signal.

Laser machine is a general term for laser engraving machine, laser cutting machine, and laser marking machine. The laser machine uses its high-temperature working principle to act on the surface of the material to be processed, and at the same time, according to the graphics input into the machine, it draws the patterns and words required by the customer.

Among them, the laser engraving machine can be subdivided into non-metallic laser engraving machines, such as wooden handicraft engraving machines, stone shadow engraving machines, etc.

Metal laser engraving machines, e.g., CO2 laser enggravers.

Friend, this feeder is the kind of signal cable used by cable TV or satellite reception. Its role is to transmit signals.

The transmission signal is usually a 75 ohm coaxial shielded cable.

Feeder: It is the wire used to transmit signals.

The feeder cabinet is also the wiring cabinet; It can be a strong or weak current bus incoming line and then distributed to each terminal; For example, the air switch box of the power line and the more multi-** matching box used in the recent decoration can be called "feeder cabinet" in enterprises and institutions, industrial and mining enterprises, shopping malls, and entertainment venues because of their large capacity. The home place is called a feeder box, which is commonly known as a wiring box and feeder panel.

Tell me where the encoder, the spindle, the x

The YZ axis is like a good one, mainly to feedback the precise position of the driver to the driver's Zen signal.

Biology Compulsory 3 is clear. The result of a system's regulation in turn acts on the process of system's regulation, which is called feedback regulation. It is an important mechanism to maintain the homeostasis of the internal environment.

Feedback regulation is mainly an autoregulatory mechanism in humoral regulation.