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PCB Designing

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  1. INTRODUCTION
    4 Topics
  2. CONDUCTOR AND CONDUCTIVE PATHS
    3 Topics
  3. ZERO PCB
  4. OVERVIEW OF ELECTRONICS
    4 Topics
  5. ACTIVITY 1
  6. CLASSIFICATION OF PCB
    2 Topics
  7. COMPOSITION OF PRINTED CIRCUIT BOARD
  8. BRIEF ABOUT COPPER
  9. COLOR OF THE PRINTED CIRCUIT BOARD
  10. ACTIVITY 2
  11. PCB DESIGNING
    2 Topics
  12. PCB DESIGNING SOFTWARE
    3 Topics
  13. ACTIVITY 3
  14. EAGLE OVERVIEW
    2 Topics
  15. PCB TERMINOLOGIES
    13 Topics
  16. ACTIVITY 4
  17. SCHEMATIC STUDY
    4 Topics
  18. ACTIVITY 5
  19. SCHEMATIC DESIGN
  20. ASSIGNMENT 1
    2 Topics
  21. ACTIVITY 6
  22. LAYOUT DESIGN
  23. Activity 7
  24. ROUTING
    5 Topics
  25. ASSIGNMENT 2
    1 Topic
  26. ROUTING RULES
    6 Topics
  27. ERC
    8 Topics
  28. DRC
    3 Topics
  29. ACTIVITY 8
  30. GROUND PLANE
  31. GERBER GENERATION
    4 Topics
  32. BILL OF MATERIAL
    1 Topic
  33. ACTIVITY 9
  34. PCB MANUFACTURING
  35. MISCELLANEOUS ACTIVITY
  36. MISCLLANEOUS ASSIGNMENT
    1 Topic
Lesson 37, Topic 1
In Progress

SUBSTRATE

21/05/2024

SUBSTRATE:

 

A PCB is sort of like a layer cake or lasagna- there are alternating layers of different materials which are laminated together with heat and adhesive such that the result is a single object.

 

 
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FR4

 

The base material, or substrate, is usually fiberglass. Historically, the most common designator for this fiberglass is “FR4”. This solid core gives the PCB its rigidity and thickness. There are also flexible PCBs built on flexible high-temperature plastic .

You will find many different thickness PCBs

Perf board
 

Cheaper PCBs and perf boards (shown above) will be made with other materials such as epoxies or phenolics which lack the durability of FR4 but are much less expensive. You will know you are working with this type of PCB when you solder to it – they have a very distinctive bad smell. These types of substrates are also typically found in low-end consumer electronics. Phenolics have a low thermal decomposition temperature which causes them to delaminate, smoke and char when the soldering iron is held too long on the board.

Types of FR4( fire resistance) material:

FR1:  50 ºC

FR2: 100ºC

FR3: 150ºC

FR4:180ºC