There are several methods to check the spacing distance
between components using Unisoft software. For instance, you can
automatically identify
component pins on unique reference designators if the pins on the components
are 75 mils or closer to each other. Or the component can be visually
inspected on the display. Also the measurement tool can be used to manually
check distances.
The
preferred method involves
using the Unisoft .FBA file. This file contains all the
XY data for the components and pins on the PCB, allowing the software to
compare each pin against all other pins on the board.
Click for
details.
Using the .FBA file, the result is that the Unisoft software calculates the distance between closely spaced
pins up to the limit you designate. For example, it lists all pins on unique
reference designators that are 150 mils apart or less (see sample below)
Ref. Des. #1 Pin
X Y
Surface Ref.
Des. #2 Pin X
Y Surface
Distance Between Pins
U4
11 -5.475 2.240
T
U6
48 -5.388 2.240
T
0.0870
R41
1 -5.250
1.395 T
U9
35 -5.350 1.400
T
0.1001
C1
1 -4.800
0.320 T
U1
14 4.700
0.360 T
0.1077
For more details
contact Unisoft.
DFM / DFA / DFT checks the Unisoft
software supports:
Design for Manufacturing / Assembly / Test (DFM / DFA / DFT) for PCB
manufacturing is a very broad and complex subject area. DFM / DFA / DFT in PCB
electronics manufacturing is a comprehensive approach aimed at designing
PCBs in a way that makes them easier and more cost-effective to manufacture.
DFM / DFA / DFT checks focus on optimizing the design of a PCB to ensure it meets
manufacturing capabilities while minimizing potential issues that could
arise during the manufacturing process. The goal is to improve the overall
efficiency of production, reduce costs, and ensure the quality of the final
product. Most aspects of DFM / DFA / DFT are addressed during the design phase of
a printed circuit board (PCB), utilizing sophisticated software and
techniques provided by various CAD systems. These systems are essential for
designing PCBs, and there are hundreds of DFM / DFA / DFT criteria that need to be
checked. When done correctly, adequate DFM / DFA / DFT measures should be in place
before the assembly and testing of the board begin. The Unisoft software,
which imports various CAD files and bills of materials (BOM) from the PCB
CAD Design Systems, can assist in verifying that DFM / DFA / DFT has been properly
applied to the PCB design in certain areas. For more details on these methods, contact Unisoft directly
or use the online help tooltips provided.
Areas where
the Unisoft software may assist in verifying that DFM / DFA / DFT was executed properly:
Component Placement
Spacing: The Unisoft software cross checks that proper spacing between
components is in place on the PCB by testing the distance between pins for
unique reference
designators. This proper spacing
between components is normally done in the design phase of the PCB. Proper spacing
between components allows for efficient assembly and to
minimize issues during
soldering processes.
Test Probe Access
Nets: The Unisoft software cross checks that proper test probe assess is
available by analyzing each electrical net trace to ensure access for test
probes. This proper test
probe assess is normally
done in the design phase of the PCB. Proper test probe access minimizes
issues during testing phases of the manufacturing process in functionality
and quality assurance.
Ensuring that the PCB design supports comprehensive electrical testing is a critical
Design For Test (DFT) consideration that facilitate In-Circuit testing
(ICT), Flying Probe, Functional testing, etc.
Assembly and Fabrication Notes: Includes
detailed notes and specifications for the manufacturer regarding assembly
processes, material requirements, and any special
handling or processing needs. The Unisoft software creates process assembly
documents.
Supply Chain Considerations -
DFM / DFA / DFT can extend to include considerations of the supply chain, such as the
availability of components, lead times, and the impact of using
alternate parts.
Early consideration of these factors can help in avoiding delays and redesigns due to parts being unavailable or
having longer than expected lead times.
The Unisoft
software lookup by manufactures part number, etc. feature can aid in this
area.
