A Commercial Printed Circuit Board Design
1.Schematic capture through an electronic design automation tool. 2.Card dimensions and template are decided based on required circuitry and case of the PCB. Determine the fixed components and heat sinks if required. 3.Deciding stack layers of the PCB. 1 to 12 layers or more depending on design com...
PCB Design Overview
A board designed in 1967; the sweeping curves in the traces are evidence of freehand design using self-adhesive tape. Printed circuit board artwork generation was initially a fully manual process done on clear mylar sheets at a scale of usually 2 or 4 times the desired size. The schemati diagram was...
How to Remove Solder from a Circuit Board Hole
There are several effective methods for removing solder from a PCB hole. Excess solder filling a hole happens quite often. Usually, the clog is residual solder that occurs when an existing electronic component is desoldered and removed. Desoldering Bulb My favorite desoldering tool is a desoldering...
Common Soldering Problems
Disturbed Joint A Disturbed joint is one that has been subjected to movement as the solder was solidifying. The surface of the joint may appear frosted, crystalline or rough. Often called a 'Cold Joint'. They can look similar to a true cold joint, but the cause is different. Repair: This joint c...
PCB Soldering Overview
Soldering is a pcb board process in which two or more metal items are joined together by melting and flowing a filler metal (solder) into the joint, the filler metal having pcb board a lower melting point than the adjoining metal. Soldering differs from welding in that pcb board soldering does not pc...
Etch Outer PCB Layers
We have now plated the panel with 25 microns of copper through the hole and an additional 25 – 30 microns on the tracks and pads. The copper is covered with a thin layer of tin as an etch resist. Now we will remove the unwanted copper foil from the surface. We do this on a single continuous proc...
Drilling Printed Circuit Boards
X-ray drill of reference holes Now we drill the holes for leaded components and the via holes that link the copper layers together. First we use an X-ray drill to locate targets in the copper of the inner layers. The machine drills registration holes to ensure that we will drill precisely through...
PCB multilayer fabrication - lay-up and bond
When the inner core of our multilayer is now complete. Next we punch the registration holes we will use to align the inner layers to the outer layers. The operator loads the core into the optical punch which lines up the registration targets in the copper pattern and punches the registration holes....
PCB Manufacture Step by Step
The board designer has prepared his layout on a Computer Aided Design or CAD system. Each CAD system uses its own internal data format, so the PCB industry has developed a standard output format to transfer the layout data to the manufacturer. This is Extended Gerber or RS274X. The Gerber files de...
How to Solder a Printed Circuit Board
Soldering a PCB is probably the most common soldering task an electronics hobbyist will perform. The basic techniques are fairly easy to grasp but it is a skill that will take a little practice to master. The best way to practice is to buy a simple electronics kit or assemble a simple circuit (such a...
