Presensitized PCB 15 x 20cm

Description

A “Presensitized PCB (Printed Circuit Board) 15 x 20cm” is a circuit board used in electronics for creating custom electrical circuits. The “presensitized” aspect indicates that the board is pre-coated with a photosensitive material that makes it easier to create custom circuit traces through a photographic development process. Here’s a description of its key features and characteristics:

1. Size: The dimensions of the PCB are 15 x 20cm, meaning it measures 15 centimeters in width and 20 centimeters in length. The size provides ample space for designing and prototyping electronic circuits.

2. Presensitized: The PCB comes pre-coated with a layer of photosensitive material, typically a dry film or wet film photoresist. This coating is light-sensitive and will harden when exposed to ultraviolet (UV) light.

3. Copper Layer: Beneath the presensitized layer, there is typically a layer of copper. This copper layer is used to create the circuit traces and connections by etching away the unwanted copper after exposure and development.

4. Double-Sided or Single-Sided: PCBs can be single-sided or double-sided. Single-sided PCBs have copper traces on one side, while double-sided PCBs have traces on both sides. The choice depends on your circuit design and requirements.

5. Holes and Pads: The PCB will often feature pre-drilled holes and copper pads for mounting components. These holes are typically placed in standard patterns and sizes for compatibility with common electronic components.

6. Prototyping: Presensitized PCBs are commonly used for prototyping and creating custom electronic circuits. You can design your circuit, transfer it onto the photosensitive layer, and expose it to UV light to develop the traces.

7. Etching Process: After the exposure, the unhardened photoresist can be removed, leaving behind the pattern of your circuit traces on the copper layer. Then, the unwanted copper is etched away using an etchant solution, leaving only the desired traces.

8. DIY Electronics: These PCBs are often used by electronics enthusiasts, students, and hobbyists for creating custom circuits, Arduino projects, and more.

9. Educational Tool: Presensitized PCBs are also used in educational settings to teach electronics, soldering, and PCB design.

10. Custom Applications: They are ideal for creating custom electronic projects, such as audio amplifiers, power supplies, LED displays, and more.

Presensitized PCBs offer a convenient and practical way to create custom electronic circuits. The presensitized layer simplifies the process of designing and producing your own PCBs without the need for specialized equipment for photoresist application. It is a valuable tool for electronics enthusiasts and those involved in DIY electronics projects.