What is a FR4 PCB?
FR-4 is a common material for printed circuit boards (PCBs). A thin layer of copper foil is typically laminated to one or both sides of an FR-4 glass epoxy panel. These are commonly referred to as copper clad laminates. The copper thickness or copper weight can vary and so is specified separately.
What is FR4 used for?
FR4 is the most common grade dielectric material that is used in the fabrication of circuit boards. This material is incorporated in single-sided, double-sided, and multi-layered boards. FR4 is the most common grade dielectric material that is used in the fabrication of circuit boards.
What is main PCBA?
PCBA, short for printed circuit board assembly, refers to the combination of PCB, components and electronic accessories.
Why FR4 material is used in PCB?
FR4 is rightly the most used material in PCB construction. Boards made from FR4 are strong, water resistant, and provide good insulation between copper layers that minimizes interference and supports good signal integrity.
How strong is FR4?
45,000 PSI
As we’ve written in this blog before, FR-4 rivals the strength of some metals. The Ultimate Tensile Strength (UTI) of FR-4 is 45,000 PSI while the UTI of cast iron is 29,000 PSI. Copper comes in at 31,900 PSI and aluminum is 43,500 PSI.
What color is FR4?
FR4 COLORS: BLACK, BLUE, YELLOW, RED, ORANGE & TAN AS WELL AS NATURAL (other colors available upon request) Colored FR4 is available in black, blue, yellow, and natural.
What is PCBA made of?
Typically, PCBs are made from non-substrate materials with layers of copper circuitry. However, different types of PCB differ in their construction. For example, while some printed circuit boards contain a single layer of copper circuitry, more advanced PCBs may contain 50 or more.
What is PCBA testing?
The Printed Circuit Board Assembly (PCBA) process has multiple types of testing such as AOI, AOX, ICT, Smoke Testing, Black Box Testing, and Regression Testing. Functional Testing (FCT) powers the device and validates expected operations.
Does FR4 absorb water?
Standard 130Tg FR4 materials typically have a moisture absorption rate of 0.20% when measured using a 0.028″ core material. Phenolic materials often measure moisture absorption of up to 0.45% when measured using the same test vehicle.
Is FR4 brittle?
The material properties of the viscoelastic laminate are also temperature dependent. At low temperatures (below Tg and in the glassy region), the material will be rigid and somewhat brittle.
Is PCB a plastic?
Once the resin hardens, PCB laminates are like a plastic composite, with sheets of copper foil on both sides.
https://www.youtube.com/watch?v=lpwlDbHpDP0