Automated & Manual DFM Services

DWB Tech has the capability to perform DFM services on all DWB designed products, as well as designs done by customers or outside agencies. As a supplement to the automated analysis, a visual check is done to review the items not automatically checked. Every DWB Tech design goes through our QA process a minimum of two times to ensure that your design is error free.

NETLIST ANALYSIS

  • All shorts and opens identified by net name
  • Intentional shorts or opens need to be specified

SOLDERPASTE CHECKS

  • Presence of paste on all SMT pads
  • Size of paste matches SMT pad (1:1)

POWER/GROUND PLANE CHECKS

  • Non-plated hole to copper spacing
  • Via/plated hole pad to plane spacing
  • Thermal relief connections (negative planes only)
  • Plane spacing
  • Copper to board edge clearance

DRILL CHECKS

  • Minimum drill size
  • Duplicate holes
  • Touching holes
  • Hole spacing
  • Missing or extra holes
  • Hole to board edge spacing

SOLDERMASK CHECKS

  • Consistent clearance on pads (cleared or 1:1)
  • Tented vias (unless specified as intentional)
  • Mask coverage of adjacent features
  • Board edge mask clearance
  • Mask web/sliver width
  • Missing mask openings

SIGNAL LAYER CHECKS

  • Line width and spacing
  • Line/pad and pad/pad spacing
  • Non-plated hole to copper spacing
  • Copper to board edge spacing
  • Via and plated hole annular ring
  • Trace stubs

SILKSCREEN CHECKS

  • Silkscreen on via pads, SMT pad, PTH pads (especially text)
  • Silkscreen to board edge
  • Silkscreen line width
  • Silkscreen text height
  • Silkscreen text overlapping

DESIGN DATA

  • Review board for pin 1 presence in silkscreen
  • Review for missing silkscreen reference designators on major components
  • Ensure fiducials are adequate
  • Review plane connections to ensure thermal reliefs are present
  • Review connections of small discretes for thermal connections
  • General observations to identify unusual issues

FAB/ASSEMBLY DRAWINGS

  • Breakaway or panelization recommendations
  • Review notes for any inconsistencies, specs, etc.
  • Review Drill tables for consistency with data
  • Review fab dimensioning
  • Review for part numbers, revs, dates, etc.