On thelayout side of the PCB design tools,the goal is to model the physical shape of a resistor as clearly as possible into CAD parts called footprints. Precise footprints are important in order to show how many leads the resistor has, where they will solder onto the board, and the con...
Their usage has not stopped till date and only technique has changed wherein in the current practices where there is more use of the printed circuit boards, the holes present in the boards are used to insert the lead and then the reverse side is used to solder it where one can find the...
The capacitor which uses Mica like the dielectric material is known as a mica capacitor. These capacitors are available in two types like clamped and silver. Clamped type is now considered outdated because of their lower characteristics but the silver type is used in its place. These capacitors ...
but their position in a surface mount pad makes them unique. If a standard mechanical drill is used, the via will require extra fabrication steps to prevent solder on the pad from flowing down through the hole. Microvias on the other hand don’t have this problem, but they can be more d...
This welding method typically uses acetylene or gasoline as its fuel gas, which makes it known as oxyacetylene, oxy-gasoline welding. Other gases, such as hydrogen and propane, can be used to braze and solder non-ferrous metals but they do not generate enough heat to melt steel. A unique...
However, PCBs follow two different types of mounting techniques to incorporate the transformer over the board surface. These two methods include: ·Surface Mounted This method usessolder pasteandsolderingtechniques to solder the transformer over the PCB surface directly. However, if the PCB is exposed...
The package types and package and lead configurations available are numerous. In addition, the requirements of surface mount components are far more demanding. SMD or SMCs must withstand the higher soldering temperatures and must be selected, placed, and soldered more carefully to achieve acceptable ...
well as base material, are known as single-sided PCBs. The thin metal layer, for example, copper that conducts electricity properly is applied over this layer. In addition to the silk screen finish, the layer of copper on these PCBs additionally has a protectingsolder maskput on top of it...
When a via and SMD pad have soldermask clearance, and the two are too close together, the soldermask bridge between the two objects can disappear and solder paste will flow down into the via during the soldering process, creating a bad solder joint on the SMD pad. Even if a via and ...
With FC-PGA, the raw silicon die is mounted face down on the top of the chip substrate, and instead of wire bonding, the connections are made with tiny solder bumps around the perimeter of the die. The edge is then sealed with a fillet of epoxy. With the original versions of FC-PGA...