What Is a Thin Film Substrate?

Film is a thin, soft, transparent sheet. Made of plastic, adhesive, rubber or other materials. The scientific explanation of thin film is: a two-dimensional material formed by the deposition of atoms, molecules or ions on the surface of a substrate. Example: Optical film, composite film, superconducting film, polyester film, nylon film, plastic film, etc. Film is widely used in electronics, machinery, printing and other industries.

[báo mó]

Film is a thin, soft, transparent sheet. Made of plastic, adhesive, rubber or other materials. The scientific explanation of thin film is: a two-dimensional material formed by the deposition of atoms, molecules or ions on the surface of a substrate. example:

Pinyin: báomó

English definition: [thin film; film]

Interference caused by a thin film. The film can be a transparent solid, a liquid, or a thin layer of gas sandwiched between two pieces of glass. The incident light is reflected on the upper surface of the film to obtain the first light, the refracted light is reflected on the lower surface of the film, and the second light is refracted on the upper surface. Is coherent light and belongs to sub-amplitude interference. If the light source is an extended light source (

There are no uniform rules for the classification of films. There are three general classifications that people are used to:

Classified according to the raw materials used for film forming: polyethylene film, polypropylene film,

Yttrium trioxide

Name: Yttrium (Y)

Yttrium trioxide, (Y2O3) using electron gun

The technique of depositing a thin layer of metal onto a substrate or a previously obtained thin layer is called surface deposition. "Thin" here is a relative concept, but most deposition techniques can control the thickness of the thin layer in the range of several to several tens of nanometers, and the molecular beam epitaxy technique can obtain a single atomic layer structure.

Deposition techniques are used in optical instruments (anti-reflection films, anti-reflection films, self-cleaning surfaces, etc.), electronic technologies (thin film resistors, semiconductors, integrated circuits), packaging and modern art. When film thickness is not critical, techniques similar to deposition are often used. For example: the electrolytic purification of copper, silicon deposition, and uranium purification all use processes similar to chemical meteorological deposition.

The deposition technology is mainly based on the vapor deposition method. According to the principle, it can be divided into two categories: chemical vapor deposition (CVD) method and physical vapor deposition method.

PVD method has unique advantages over CVD method. Therefore, PVD method is mostly used in the preparation of metal multilayer films.

PVD methods can take many different forms, such as vacuum evaporation deposition, sputtering deposition, ion beam and ion beam irradiation deposition, molecular beam epitaxial deposition, pulsed laser deposition, ionized cluster beam deposition, pulsed arc deposition, and so on.

There are many types of films on the market, but the most commonly used printing films are BOPP, NY, PET, PE. As far as printing is concerned, the most important thing is of course the surface treatment effect of the film and whether the NY film is wet. When printing, process requirements for film surface tension of a film should be established. The corona effect is time-effective. If it is left for a long time, the corona effect may decrease too much to meet the printing requirements; it can also avoid the hidden trouble of inadvertently reverse the film surface printing.

PE film is our main focus: when the film is blown, the film roll may miss the corona treatment; if the film thickness is too large or uneven, the corona effect is not enough; the blowing film is added with too many slip agents or high cooling The too large proportion of sliding material causes the corona effect to decrease greatly. When the corona effect on the two sides of the 12 ~ 15um PET film is not much different, it is easy to cause the back sticking failure of the printed film roll. Corona requirements for printed films: BOPP, PE 38 dyne, PET 50 dyne, NY 52 dyne. After the NY film absorbs water, it will not have a great impact on the corona effect. Determine whether the NY film absorbs water and see if the film shrinks. If you cut a film and put it in the oven for several hours, do you feel hard? , Hardening, etc., the NY film absorbs too much water. When purchasing a film, you must explain the use and requirements of the film to the supplier, and refine the film variety. Just say the names of PET, NY, and BOPP. The supplier may have several varieties, but not necessarily all suitable.

use

This series of tensile testing machine is suitable for tensile testing of rubber, plastics, textiles, waterproof materials, wires and cables, net ropes, metal wires, metal rods, metal plates and other materials. Additional attachments can be used for compression and bending tests. It has functions of digital display of test force, continuous adjustment of test speed, automatic shutdown of sample breaking, peak hold, etc.

Functions and features:

1. Adopt high-precision, all-digital speed-adjusting system and precision reducer to drive the precision screw pair to carry out the test, to achieve a wide range of test speed adjustment, the test process is low noise, and the operation is stable.

2. The universal joint adopts the cross pin structure and has the function of limiting the swing angle. On the one hand, it is convenient to clamp the sample and ensure the concentricity of the test. On the other hand, the influence of the irregular sample on the sensor is well eliminated.

3. Touch key operation mode, LCD display in real time. The display interface can display the test method selection interface, test parameter selection interface, test operation and result display interface, and curve display interface, which is convenient and fast.

4. It can adjust the speed of the beam when the sample is clamped, and it has protection devices such as overcurrent, overvoltage and overload. .

5. Optional microcomputer interface, which can be connected to a microcomputer to realize the test process control and data storage and printing.

Main Specifications:

1. Maximum test force: 500N;

2. Range: 0N-500N;

3. Test force accuracy; better than ± 1%;

4. Displacement resolution: 0.01mm;

5. Accuracy of displacement measurement: better than ± 1%;

6. Stretching stroke: 600mm or 1000mm (optional)

7. Compression stroke: 600mm or 1000mm (optional)

8. Test stroke: 600mm or 1000mm (optional)

9. Control range of displacement speed: 1mm / min 500mm / min (common configuration)

10. Displacement speed control accuracy: better than ± 1%;

11. Test machine level: better than level 1

12. Deformation indication error: ± (50 + 0.15L)

13. Test machine size: 530 * 266 * 1450 or 1810 mm

14. Appearance: Meet GB / T2611 requirements

15. Completeness: meet the standard requirements

16. Protection function: The test machine has overload protection function

17. Power supply: 220V, 50Hz

18. Weight: 150KG

The patchwork is too narrow, the greenhouse film is formed by splicing a number of narrow films, and the bonding area should be increased during splicing to improve the bonding strength. If the seam is too narrow, it will cause cracks when the bonding area is small.

After pressing the film to build a greenhouse cover with a film, immediately press the film with a film. Generally, a laminating line is pulled every 1-2 scaffolds. The tightness of the line should be moderate. At the same time, a simple windbreak is set up on the windward side.

The film is to be repaired. The film is easy to be damaged during use and storage. Temporary repair methods can be used for damage during use. There are two methods: First, the method of water replenishment, scrub the damaged area, cut a piece of film without holes larger than the damaged area, dipped in water to stick to the holes, and drain the air between the two films. Yes; the second is the method of paper replenishment. If the agricultural film is slightly damaged, the paper is dipped in water and affixed to the damaged place while wet. Generally, it can be used for about 10 days.

The damaged film after demolition shall be permanently repaired. The thicker film is broken, and it can be covered with a film of the same texture and connected with thin threads. You can also wash the damaged area, cover the hole with a slightly larger film, cover it with 2-3 layers of newspaper, and gently iron along the interface with an electric iron. The two films are heated and pasted. After cooling, they will stick to Together, this method is referred to as the hot patch method. In addition, there is a glue repair method. Wash the holes around and use a brush to apply special glue. After 3-5 minutes, take a film of the same texture and stick it on. After the glue is dry, it can stick firmly. The heat repair method and the glue repair method are good for film repair. The seam repair method not only leaks air, but also is easy to pull apart. It is best not to use the film with a thick texture.

When not in use, dig the buried film during storage, and strictly prevent exposure, smoking, and fire baking, otherwise, its service life will be greatly shortened. The best storage method for shed film is digging and burying. After the production is finished, the removed film must be washed and dried first, wrapped with old film after being rolled up, choose a place where the soil is dry and humid, and dig a pit, then wrap Good film is buried in the pit. Note that the distance between the upper layer of the film and the ground is more than 30 cm. This method can avoid the aging and brittleness of the agricultural film stored in the air, and shorten the service life.