Views: 10 Author: Site Editor Publish Time: 2023-08-14 Origin: Site
1. Annular ring
The copper ring around the electroplated through-hole in the PCB.
Design Rule Check. Perform software checks on the design to ensure that it does not contain errors, such as improper wiring contact, thin wiring, or small drilling holes.
3. Drilling hit
The locations where holes should be drilled in the design, or where they are actually drilled on the circuit board. Inaccurate hit of drill bits caused by blunt drill bits is a common manufacturing problem.
4. Golden Finger A metal solder pad exposed along the edge of a circuit board, used to establish a connection two circuit boards.
Common examples are computer expansion boards or memory boards, as well as the edges of older cassette based video games.
5. Stamp hole
Stamp holes are an alternative method for separating the V-score of the board from the panel. Many drilling holes are concentrated together, forming a thin weakness that can easily break the board afterwards.
6. Solder pad
The exposed metal part on the surface of a circuit board, used for soldering components.
A larger circuit board composed of many smaller circuit boards that are disassembled before use.
Automated circuit board processing equipment often encounters problems when processing smaller circuit boards, and by gathering multiple circuit boards together at the same time, it can significantly accelerate processing speed.
8. Paste Template
A thin metal (sometimes plastic) template located on a circuit board that allows solder paste to deposit in specific areas during assembly.
9. Take and place
A machine or process that places components on a circuit board.
A continuous copper block on a circuit board defined by a boundary rather than a path, commonly referred to as "inverted".
11. Electroplated through-hole
A hole on a circuit board that has a circular ring and is continuously electroplated through the circuit board. It may be the connection point of the through-hole component, the through-hole through which the signal passes, or the installation hole.
Insert the PTH resistor of the PCB and prepare for welding. The legs of the resistor pass through the hole. Plating holes can have traces connected to the front and back of the PCB.
12. Spring type contact
Spring type contacts are used for temporary connections for testing or programming purposes.
13. Reflow soldering
Melt the solder to form a joint between the solder pad and the component lead.
14. Screen printing
Letters, numbers, symbols, and images on the circuit board. Usually only one color is available, and the resolution is usually very low.
Any non circular holes or slots on the board may or may not be electroplated. Slots sometimes increase the cost of circuit boards because they require additional cutting time.
Note: The corners of the slots cannot be made completely square because they are cut with a circular milling cutter.
16. Solder paste
A small solder ball suspended in the gel medium is applied to the surface mount pad on the PCB before placing the component with the help of the solder paste template.
During reflow soldering, the solder in the solder paste melts, forming electrical and mechanical joints between the solder pads and components.
17. Solder paste
Paste for quick manual soldering of circuit boards with through-hole components. Usually containing a small amount of melted solder, the circuit board is quickly immersed in it, leaving solder joints on all exposed solder pads.
18. Solder mask layer
A layer of protective material covering metal to prevent short circuits, corrosion, and other problems. Usually green, but other colors (SparkFun red, Arduino blue, or Apple black) are also possible. Sometimes referred to as' resistance '.
19. Solder jumper
A small piece of solder that connects two adjacent pins on a component on a circuit board. According to design, solder jumpers can be used to connect two pads or pins together, which may also cause unnecessary short circuits.
20. Surface Mount
A construction method that allows components to be simply installed on the board without the need for leads to pass through holes on the board. This is the main assembly method used today, which allows for quick and easy assembly of circuit boards.
21. Heat dissipation hole
A small trace used to connect a pad to a flat surface. If the pad does not dissipate heat, it is difficult to reach a high enough temperature to form a good solder joint. When you try welding, improperly cooled pads will feel "sticky" and reflow will take an abnormally long time.
Shadow lines, grid lines, or copper dots remain in areas of the circuit board without flat or trace lines. Reduce the difficulty of etching as it takes less time to remove unwanted copper in the groove.
The continuous path of copper on the circuit board.
By cutting parts of the board, the board can easily break along a line.
25. Through hole
A hole on a circuit board used to transmit signals from one layer to another. The tent holes are covered with a solder mask to prevent them from being welded. The vias for connecting connectors and components are usually not covered, so they can be easily soldered.
26. Wave soldering
A welding method for circuit boards with through hole components, wherein the circuit board adheres to exposed solder pads and component leads through standing waves of molten solder.