A Complete list of other Terms related to Circuit Board PCB (I)

A complete list of other terms related to circuit board PCBS

1. AcousTIc Microscope(AM

It is a technique for non-destructive inspection of fine electronic seals by means of ultrasonic wave with frequency of 10 ~ 100MHz and water-powered media. For example, this method can be used for imaging inspection of the sealing quality of the packaged traditional IC or the densely assembled PCBA. There are two practical models of laser Scan (SLAM) and C-mode scan (C-SAM) on the market.

2. Aerosol, aerosol, aerosol aerosol

Refers to the mixture of gases that can be dispersed into tiny colloidal particles in the air, which is the packaging of a certain liquid pressure vessel and the distribution method of pressure discharge. Such as daily life used in the spray hair spray, can spray paint, etc.

3, AliphaTIc Solvent

Organic compounds are generally classified as aliphatic compounds consisting of direct carbon compounds, and AromaTIc compounds containing benzene rings. Some organic solvents of directly refined molecules, such as ethanol, acetone, butanone (MEK), trichloroethane, etc., are called "aliphatic solvents".

4. Ambient Tamp

Temperature in the vicinity of a processing station or process line.

5.Amorphous and amorphous shape

A substance, such as plastic cement, whose atoms are arranged without a fixed configuration.

6.  Anisotropic

A PCB process that Undercut well and shows only vertical positive erosion, with no bad side erosion yet, is called Anisotropic Etching. In addition, when packaging or assembly, in the case that orthodox welding is not possible (such as ITO circuit behind LCD glass display, interconnect and fixation with PCB, etc.), vertical unidirectional "conductive adhesive" can be used to engage or assemble between different material layers to complete the interconnection of the system. For example, the resin itself originally expanded in the same direction in three dimensions, but after adding fiber reinforcement, X and Y were limited, but it highlighted that there was still a great deformation in the Z direction, also known as one-way change.

7. Anneal toughens

The process of heating a metal to a temperature close to the melting point and then slowly cooling it to room temperature to eliminate hardness and brittleness and increase toughness. Brittleness may occur naturally or due to pressure or bending. This word is also sometimes used as an adjective Annealed and also a gerund, Annealing.

8. ANSI American Standards Institute

American NaTIonal Standard Institute is a private corporate academic organization, has issued more than 400 authoritative and practical codes and standards for various industries.

9. Azeotrope mixture

Narrow sense refers to the composition of two or more solvents, according to a certain proportion of mixed point liquid, the vapor not only has a common boiling point, but also can maintain the same proportion. And its boiling point is lower than each participating solvent, can use different dissolution force to clean the residual after welding, and can be recycled. In a broad sense, it refers to any mixed liquid with the same proportion of liquid to vapor and the same boiling point, also known as Azeotrope.

10. Braid knitting

Using tinned fine copper wire, woven into a tubular layer of network wire, over the already insulated cable, as a Shield for internal high-speed wires, or as another ground wire for batteries. In the circuit board is often used to braid with flux, in the high temperature of the iron to absorb the hole or solder spot on the excessive solder.

11. Buoyancy is buoyancy 

When a solid enters a liquid, it will occupy or displace the volume of the liquid, and the weight of the volume of the liquid is the buoyancy of the liquid on the solid. In the electronic industry, when carrying out solderability test of parts feet with a tin Balance, the buoyancy of molten tin must be overcome first.

12. Cable

The traditional name of "cable", whether a single strand of wire or a bundle of wire (whether or not insulation sheath) are all called cable. In the downstream assembly of the circuit board, the original Flat coated wire, called Flat Cable, later in order to save costs and reduce the volume, and use the PI plate of soft board to make a finer and denser "flat wire", called soft flat Cable (Flex Flat Cable), commonly known as a single surface soft board, also belongs to the cable class.

13. Capillary Action is capillary action

Refers to the liquid surface and solid surface in the fine tube, in the air contact with the "edge line" action, if the diameter of the "edge line" action is more obvious. The fine glass tube is inserted into a cup of liquid. When the cohesion of the liquid is greater than the adhesion to the solid, the liquid level in the tube will be central bulge. And after the interaction, the liquid level inside the tube will drop below the liquid level outside the tube, which is called "Non-Wetting", such as mercury. On the contrary, if the cohesion of the liquid is less than the adhesion to the solid, the liquid level in the tube will be concave. After continuous action, the liquid level in the tube will rise, which is called "Wetting "(Wetting), as in water. The structure from the root to the high leaf tip, washing clothes, etc., are the specific performance of capillarity.

14, Card Cages/Card Racks circuit board packing

It is a kind of Assembled Board or Loaded Board (Assembled Board or Loaded Board) piece by piece vertical or horizontal parallel densely arranged clamping, and to form a three-dimensional cage or box structure, is the electronic central part of a large system, each piece of the board must be left space for heat dissipation.

15, The Card

Circuit board is an informal address method, often refers to the surrounding function of the narrow or small board, such as adapter card, Memory card, IC card, Smart card, etc.

16. Cavitation and semi-cavitation

When powerful cavitations are made in the liquids, the fronts of the cavitations push the liquids at high speed. When the cavitations fail to cavitate in time, a "semi-vacuum" Cavitation can be formed, called cavitations. Such as the agitation of the ship propeller, or the high frequency of the ultrasonic oscillator to push the water body, will produce friction, and then cooperate with the liquid dissolution force, to achieve the purpose of cleaning double effect.

17. CFCS

Chloro-Fluoro-Carbon However, because it cannot accept biological decomposition, and the weight is very light, gradually rising and accumulating will destroy the protective layer of ozone outside the earth, so that the ecological environment of the earth under the attack of cosmic rays, resulting in a great crisis. NASA confirmed that the current situation is more serious than previously detected. The United States has banned it since 2000 in the original Montreal Treaty resolution, and in 1995, Japan and Australia followed suit, also in 1995. Germany even ahead of the complete elimination in 1994. The world has decided to cut production by 50% since 1993, a situation that will have a big impact on electronic products.

18. Chemisorption

Refers to some metal Surface molecules, or other materials with higher "surface Energy "(Surface Energy), when the contact with some gas or liquid substances, often with the formation of chemical bonds and adsorption, called Chemisorption.

19. Chlorinated Solvent has chlorine in it

Organic solvents containing carbon, hydrogen and oxygen are easy to burn in use. To increase safety, part of the hydrogen atoms in the molecule can be replaced by 1 or more halogen atoms (mainly chlorine atoms) to become a refractory "chlorinated solvent". Generally, organic solvents have safer and wider uses when chlorinated and resistant to fire. Common cases such as trichloroethane, trichlorotrifluoroethane, carbon tetrachloride, etc. However, since these CFC solvents are harmful to the earth's ecological environment, they have been banned worldwide.