Aperture ring - a copper ring on a metallized hole in a PCB.
DRC - design rules inspection.-A program to check the design for errors, such as short circuit, thin wire, or small bore.
Hole hit - this is used to indicate the deviation between the hole position required in the design and the actual hole position.
Incorrect drilling centers caused by blunt drills are a common problem in PCB manufacturing.
(gold) finger - a bare metal pad on the edge of a card, usually used to connect two circuit boards.
Such as the edge of the computer's extension module, memory sticks and old game CARDS.
Stamp hole - in addition to v-cut, another optional split design method.
With a number of consecutive holes to form a weak joint, it is easy to split the board card from the imposition.
SparkFun's Protosnap card is a good example.
The part of metal exposed on the surface of a PCB that is used to weld devices.
Assembly - a large circuit board consisting of many small, divisible circuit boards.
Automatic circuit board production equipment often has problems in the production of small board CARDS, several small board CARDS can be combined together to speed up production.
Steel mesh - a thin metal template (or plastic) that, when assembled, is placed on a PCB to allow solder to pass through certain parts.
Pick-and-place -a machine or process that places components on a circuit board.
Flat - a continuous piece of copper on a circuit board.
It's usually defined by the boundary, not the path.
It's also called copper coating.
Metallized through-hole -- a hole in a PCB that contains a ring and an electroplated wall.
A metallized hole may be a connector point for a plug-in, a signal changing layer, or an mounting hole.
Pogo pin - a temporary contact point supported by a spring and used as a test or burn program.
Reflow soldering - melts the soldering tin so that the soldering disc (SMD) is connected to the device pin.
Silk print - letters, Numbers, symbols, or graphics on a PCB board.
Basically there is only one color on each card and the resolution is relatively low.
Slot - refers to any hole in the PCB that is not circular.
The grooves can be plated or not.
As additional cutting time is required for grooving, the cost of plate card will sometimes be increased.
Solder paste layer - a thick layer of solder paste that is formed on the solder plate of the device through a steel net before placing components on the PCB.
During reflow soldering, the solder paste melts and a reliable electrical and mechanical connection is established between the soldering disc and the device pin.
Soldering furnace -- welding plug furnace.
Generally, there is a small amount of molten soldering tin in it, and the plate passes quickly on it to weld the tin on the exposed pipe foot well.
Resistance welding - to prevent short circuit, corrosion, and other problems, copper is covered with a protective film.
The protective film is usually green or other colors (SparkFun red, Arduino blue, or Apple black).
It is commonly called "resistance welding".
Soldering - two connected pins on a device are incorrectly connected by a drop of soldering tin.
Surface mount - an assembly method in which the device is simply placed on a board card, without the need to pass the device pin through the hole in the card.
Hot pad - refers to a short line connecting the pad to the plane.
If the welding disc is not properly heat dissipation design, it is difficult to heat the welding disc to enough welding temperature.
The improper design of the heat dissipation welding disc makes the welding plate feel sticky and the reflow welding time is relatively long.
Generally, the hot welding disc is made on the side where the plug-in is in contact with the wave soldering.
I don't know why reflow is mentioned in this article. The main consideration of reflow is thermal balance, preventing stele.
Wire - the path of copper, usually continuous, on a circuit board.
V-score -- the card can be broken through a straight line by making an incomplete cut.
(" v-cut ")
Hole - a hole in a board card that is used to switch signals from one layer to another.
Plug hole refers to the overlaying of the hole to prevent welding.
Connector or device pins through holes, because welding is required, usually do not plug holes.
Wave soldering - a method of welding a plug-in device.
Pass the plate card at a constant speed through a melting tin furnace that generates a stable wave peak, which will weld the device's pins together with the exposed soldering disk.
Would you like to start designing your own PCB?
The zigzag in the PCB design is too complicated on this side.
However, if you really want to start, here are a few key points.
Find a CAD tool: there are many low price or free options in the PCB design market.
When looking for a tool, consider the following.
BBS support: are there many people using this tool?
The more people use it, the easier it is to find the packaged library of the devices you need.
It's easy to use.
If it doesn't work, you won't.
Performance: many programs have limitations on design, such as number of layers, number of devices, and card size.
Most require you to purchase authorization to upgrade performance.
Inhibitive: some free programs do not allow you to export or migrate to other software, limiting you to a single vendor.
The low cost and convenience of software may be worth the effort, but sometimes it's not.
Look at other people's designs.
Open source hardware makes this easier.
Practice, practice, practice.
Keep expectations low.
The first card you design may have many problems, but the 20th one may be much less, but there are still some problems.
But it's hard to get rid of all the problems.
The schematic diagram is quite important.
It is futile to try to design a PCB card that does not have good schematic support.