Practical Hints

  1. Resistors
  2. Connectors
  3. Vias
  4. Interconnections
  5. Swaping
  6. Library
MIT  Electronics Cours BS level

 

Connectors

 

Erni 1.27mm

Interconnections

 

Advanced technology:

3D-MID technology -> 3 dimensional circuits or molded interconnect

Resistors

Values should always be of series E12 or E24. This is specially important for projects that will be assembled by machine.  Value Calculator that helps you to find the best combination for voltage deviders.

 

 

Vias

http://www.multi-circuit-boards.eu/en/pcb-design-aid/design-parameters.html

PCB Design Parameters
 
 

Name

Min. dimensions

A, B, C

via, buried via

aspect ratio
final diameter
via pad
annular ring

1:20
100µm
300µm
100µm (enclosing)

D

blind via, mechanical


 
    max. Ø
    400µm
 

aspect ratio
final diameter
via pad
annular ring

1:1
100µm
400µm
150µm (enclosing)

E

blind via, laser

aspect ratio
final diameter
via pad
annular ring

1:1
75µm
225µm
75µm* (enclosing)

F

stacked via

aspect ratio
final diameter
via pad
annular ring

1:1 - 1:12 **
100µm
300µm
100µm

G

staggered via

aspect ratio
final diameter
via pad
annular ring

1:1 - 1:12 **
100µm
300µm
100µm

H, I

conductor traces (outer, inner) - 
see Conductor / Copper Thickness

width
spacing

60µm
60µm

J

conductor / pad to milling edge

spacing

200µm

K

conductor / pad to via

spacing

200µm

L

solder-stop coating

spacing
bridge width

50µm (enclosing)
100µm

* Annular ring depends on copper thickness! Please ask for critical designs.
** Aspekt ratio depends on Ø. 100µm 1:1, >100µm 1:4, >150µm 1:10, >200µm 1:12

 

 

 

Swaping

Part and Pin Swapping

Dynamic Net Assignment (Altium only)

Dynamic Net Assignment is the ability to adopt a hierarchical and iterative routing strategy, escape routing devices first, then routing to the edge of a given area, and then finally connecting these sections together.

 

Library

Multi-part and single part symbols for the same type of quad resistor array.