What is the big black blob on circuit boards?

Its actually called Chip On Board or [COB], and the black blob is the protective covering given to the bare bone chip which is the brain of any device that is in.

Is integrated circuit a microchip?

An integrated circuit or monolithic integrated circuit (also referred to as an IC, a chip, or a microchip) is a set of electronic circuits on one small flat piece (or “chip”) of semiconductor material, usually silicon. ICs have two main advantages over discrete circuits: cost and performance.

What are the little black things on a circuit board?

Integrated circuits are the little black “chips”, found all over embedded electronics. An IC is a collection of electronic components — resistors, transistors, capacitors, etc. — all stuffed into a tiny chip, and connected together to achieve a common goal.

What is a substrate in integrated circuit?

IC substrate is a type of base board used to package bare IC (integrate circuit) chip. it can protect, reinforce and support IC chip, providing thermal dissipation tunnel.

How do you remove black epoxy from a PCB?

Heat the epoxy residue with a soldering iron set to 500-600°F. The epoxy will soften and lose adhesion, and can then be easily scrapped off. Again, this removal method can be used on metal, glass or any surface that will not be adversely affected by high temperatures, not PCB material.

Why are chips covered in epoxy?

In “wire bonding”, the chip is attached to the board with an adhesive. In all cases, the chip and connections are covered with an encapsulant to reduce entry of moisture or corrosive gases to the chip, to protect the wire bonds or tape leads from physical damage, and to help dissipate heat.

What is inside a microchip?

A microchip (also called a chip, a computer chip, an integrated circuit or IC) is a set of electronic circuits on a small flat piece of silicon. On the chip, transistors act as miniature electrical switches that can turn a current on or off.

How do you identify an integrated circuit chip?

If the markings on the chip are still legible, it is possible to markings:

1. If there are clear part numbers on the chip, the first letters are called the IC Company Prefix or manufacturer prefix.
2. If there is a logo on the chip, it’s relatively easy to find the manufacturer based on its logo.

Is a PCB a chip?

A PCB or Printed Card Board by itself has nothing to do with chips. There were PCBs already before chips existed. A PCB is a fiberglass plate with copper traces to connect all the components together. A wafer is the round plate of silicon that integrated circuits (ICs) are created on (using various chemical methods).

What is a wafer substrate?

In electronics, a wafer (also called a slice or substrate) is a thin slice of semiconductor material, such as a silicon crystal, used in the fabrication of integrated circuits and other microdevices.

How do you dissolve casting resin?

Acetone is another simple but effective way to remove resin. Similar to vinegar, acetone is found in almost every household. Put some of it on a cotton swab and rub the affected area until the epoxy resin can be removed. Note that acetone is flammable and should not be inhaled in large quantities.

What is the black blob on the PCB for?

The black blob is the only non-basic piece of circuitry present, along with an op-amp (top) and a single bipolar junction transistor. It’s called chip-on-board. The die is glued to the PCB and wires are bonded from it to pads.

What is an integrated circuit (IC)?

Integrated circuits (ICs) are a keystone of modern electronics. They are the heart and brains of most circuits. They are the ubiquitous little black “chips” you find on just about every circuit board.

What are the schematic symbols for the different types of circuits?

The schematic symbols for these types are shown below: An Integrated Circuit (IC) is usually shown as a rectangular box with pins. Below, an example of the CMOS IC 4017 is shown. The inductor symbol looks like a coiled wire as this is what an inductor essentially is.

What does the IC symbol look like?

An Integrated Circuit (IC) is usually shown as a rectangular box with pins. Below, an example of the CMOS IC 4017 is shown. The inductor symbol looks like a coiled wire as this is what an inductor essentially is. The symbol of the transformer looks like two inductors with something in between them.