Types of PCB
Single Side (II)
Double Side (III)
Single Side ( 1 layer ) :- The insulating substrate contains ckt pattern on
only one side. Which is called as solder side. The other side is called component side.
Double Side (2 layer) :- Double side means the ckt pattern is present on
the either side of the insulating material ckt pattern both on component side & solder side.
Flexible boards are similar to rigid boards except the board are made from a flexible substrate material. The base materials are very thin and the common thickness is 0.1mm.
Multi layer Board (MLB, 4L,6L,8L,12L,16L ) :
:The ckt density is high compare to D/S for inner layer made of special laminate is used for bonding purpose ( Prepreg). The inner layer is etched “CU” and outer layer is Non- etched ckt. After lamination or pressing the boards are drilled and plated like PTH D/S.
Process Flow chart for Single Side P.C.B.
Film master preparation
Roller Tinning or HAL
Process Flow Chart of Double Side P.C.B.
Film Master Preparation
PTH or Electroplating
Pattern Plating or Electro Plating
Dry film Stripping
* Sheet Cutting :-
Measure the size of PCB from film or
* Board Area
* Laminates or Copper Sheet :1. Glass Epoxy 2. Paper fenolic 3.Teflon 4. Ceramick (CEM)
* Glass Epoxy :-
Insulating Material thickness D/S