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PollEx User Guides
Discover PollEx functionality with comprehensive user guides.
Verification User Guides
This section contains the user guides for the following tools: DFA, DFE, DFE+, DFM, and Logic DFE.
DFE
DFE Items
Board
Groundwall of Via
The DFE rule checks for a proper placement of ground vias and ground wall regions.

Welcome
What's New
View new features for PollEx 2024.1.
Get Started
Learn the basics and discover the workspace.
PollEx Tutorials
Discover PollEx functionality with interactive tutorials.
PollEx User Guides
Discover PollEx functionality with comprehensive user guides.
- Manufacture User Guides
  This section contains the user guides for the following tools: Block JIG Generator, Compare GDSII, Gerber to PCB, Make Board Paneling, Metal Mask Manager, Mounting Data Extractor, Mounting Emulator, Router-Machine JIG Generator, Solder Quantity Calculator, Soldering Pallet, Test Point Location Generator, and Underfill.
- Modeler User Guides
  This section contains the user guides for the following tools: BOM, CAM, Component Arrangement Plan, CP, Golden Sample, Logic, PCB, Redmark+, and Worksheet Planner.
- Solver User Guides
  This section contains the user guides for the following tools: PI, SI, SI Explorer, and Thermal.
- Verification User Guides
  This section contains the user guides for the following tools: DFA, DFE, DFE+, DFM, and Logic DFE.
  - DFA
    PollEx DFA is an assembly status checking toolset for PCB design based on 3D package library.
  - DFE
    - Input Setup
    - Object Group Setting
      Group the same type of objects into the same group.
    - DFE Items
      - High Speed
      - Differential Pair Net
      - Net
      - Power
      - Filter
      - Component
      - Board
        Board Component Clearance
        This DFE rule checks whether components are placed enough distance away from board edges.
        Board to Net Clearance
        This DFE rule checks for the distance between signal traces and board edges.
        Groundwall of Via
        The DFE rule checks for a proper placement of ground vias and ground wall regions.
    - DFE Environment
      View DFE Environment setting methods.
    - Result
  - DFE+
    PollEx DFE+ is a fully automated SI analysis tool.
  - DFM
    PollEx DFM is a board level manufacturability checking software.
  - Logic DFE
    PollEx Logic DFE is a toolset that checks electrical validity and standardizing of schematic design.
  - Technical Cleanliness
    PollEx Technical Cleanliness (TC) is an optional module of the PollEx PCB and a reliability analysis tool set for hazardous areas on a PCB design, using its micro particles.
- UPE User Guides
  This section contains the PollEx UPE user guide.
PollEx Installation Guide
Instruction to install PollEx 2024.1.
Character String Search Rule
Definition for meta character using in making sentence for searching option.

Groundwall of Via

The DFE rule checks for a proper placement of ground vias and ground wall regions.

The designer solves the signal trace’s EMI problem by shielding them with ground. If whole PCB board makes EMI problem or weak against the problem, what can designer do? The first solution is PCB shielding with mechanical structures. However, before that, the designer hasto implement a stable PCB design. One way of PCB shielding is constructing ground wall on board. Ground wall should be constructed along board edges on all layers and connect them with ground vias. Be sure to connect them with closely placed vias. This method enhances the possibility of reducing internal EMI and outer EMI problems.

Net: Select a target ground net group.
Groundwall Ratio (%): Assign ground vias allowable coverage ratio.
Distance: Assign a clearance between via and board edges.
Via Coverage
- Default Via Coverage: Use the region defined in the Input Dialog.
- Via Coverage: User-defined coverage.
Except Net: Exclude areas from calculating the board outline area if copper exists inside the board outline area.
Except Component: Exclude component areas from calculating the board outline area if the component exists inside the board outline area. (PollEx DFE checks only those components within the distance when the Distance option is selected and the distance value is entered.)
Except Hole: Exclude hole areas from calculating the board outline area if the hole exists inside the board outline area.