1. WHO INVENTED THE PRINTED
CIRCUIT BOARD?
T h e in v e n t o r o f t h e p r in t e d c ir c u it b o a r d is t h e
A u s t r ia n e n g in e e r P a u l E is le r w h o , w h ile w o r k e d in
E n g la n d m a d e o n e a r o u n d 1 9 3 6 a s p a r t o f a r a d io .
A r o u n d 1 9 4 3 t h e U n it e d S t a t e s s t a r t e d u s in g t h is
t e c h n o lo g y o n a la r g e s c a le t o m a n u f a c t u r e r o b u s t
r a d io s f o r t h e S e c o n d W o r ld W a r .
A f t e r t h e w a r , in 1 9 4 8 , U S A la u n c h e d t h e in v e n t io n
f o r c o m m e r c ia l u s e . T h e p r in t e d c ir c u it b o a r d d id n ´t
t u r n p o p u la r a s a c o n s u m e r g o o d u n t il m id -1 9 5 0

2. WH A T I S A P RI N T E D C I R C U I T B OA RD ?
I n el ect r oni cs, a pr i nt ed ci r cui t boar d, pr i nt ed ci r cui t
b o a r d o r P CB , i s a s u r f a c e ma d e u p wi t h p a t h s o r t r a c k s o f
c o n d u c t i v e ma t e r i a l l a mi n a t e d o n t o a n o n - c o n d u c t i v e
subst r at e.
The ci r cui t i s used t o el ect r i cal l y connect vi a t he
c o n d u c t o r p a t h s , a n d me c h a n i c a l l y h o l d t h e s u b s t r a t e t h r o u g h
a s e t o f e l e c t r o n i c c o mp o n e n t s . T h e p a t h s a r e u s u a l l y ma d e
o f c o p p e r w h i l e t h e s u b s t r a t e i s ma d e o f r e s i n r e i n f o r c e d
f i b e r g l a s s , t h e we l l - k n o w n i s t h e F R 4 ( c e r a mi c s , p o l y me r s
s u c h a s Te f l o n or Ba k e l i t e

3. PRINTED CIRCUIT TYPES
MULTI LAYER: It is the most
common in commercial
products. It usually has between
8 and 10 layers, some of which
are buried in the substrate
2-SIDED PLATED HOLES : It is
a low-cost complex design with
metal holes that allows us to
make steps towards

4. HOW TO MAKE A PRINTED CIRCUIT
- P C B B o a rd
- T r a n s is t o r s
MATERIALS:
- R e s is t o r s
- Lab coat
- C a p a c it o r s
- S o ld e r in g p a s t e
- S o ld e r in g Ir o n
- F e r r ic c h lo r id e
- G lo v e s
- m a s k s - D r ill
- T in S o ld e r
- G la s s e s
- b it s

5. STEPS
STEP 1: draw the
design of the plate on a
thermo
transferable
sheet of paper. Then
make a photocopy but
in a glossy paper
STEP 2: Cut the board
made to measure and
clean it up. Rub it in
circles to obtain zests
in all directions. Draw
the circuit designed on
the bakelite.
STEP 3: Heat the iron to
maximum and apply it
on the paper to fuse the
toner and attach it to
copper. Throw the
board to the water and
prevent to shrinkage
due to cooling
STEP 4: leave
everything soaking for
a while. It depends on
how fast the dissolved
ferric chloride and
leave just the one that
is going to be part of
the track or circuit that
we need
STEP 5: Once it is dry,
you will SEE THE
BONDED FIBRES
PAPER ADDED TO THE
TONER
STEP 6: Once you have
the printed circuit
drawn, put all the
resistances and what is
needed according to
the type of design.

6. P RI NT E D B OA RD OR P CB
J o r g e Ro d r i g u e z Ag u d o 3 º B
OR
PCB

7. P RI NT E D B OA RD OR P CB
J o r g e Ro d r i g u e z Ag u d o 3 º B
OR
PCB