PCB Laser Direct Imaging (LDI)

By Dhirajprinted Circuit Board

LDI helps Elimination of Photo Tools

  • No Film/Artwork Movement
  • Quick Turn Made Easy
    • Run product as soon as Engineering releases data to the floor
  • Reduction in Defect Count.
    • Direct Write = No Film related defects
    • No issues related to loss of vacuum
PCB Laser Direct Imaging

Laser Direct Imaging

PCB Laser Direct Imaging

Scanning Optics

  • Improved Resolution
    • System Resolution 4000 dpi
    • System Capability: 50µm/50µm (0.002”/0.002”) Line & Space
    • Improved Registration
    • CCD Camera System & Target Fiducials
      • Through Holes Drilled
      • 24 Hole Pattern of Laser Drilled Microvia
    • System capability
      • Positional Accuracy   +/-25µm
      • LDI Solder Mask
    • Taiyo LDI SM

Using CCD Cameras and Mechanical or Laser Drilled Fiducials it is possible to get perfect registration every time.

Laser Drilling Technology Overview

  • Hole diameters range from 4 to 8 mils and are typically in the 5 to 6 mil range
  • Hole depth is limited by copper plating aspect ratio, typically 0.5: to 0.6:1  however higher aspect ratios can been achieved
  • Both YAG and CO2 lasers are used for PCB drilling.  YAG lasers are in the ultra violet spectrum and can drill both copper and dielectric.  CO2 lasers are in the infrared spectrum and can drill dielectric materials
  • The combined use of YAG and CO2  lasers allow lasing of all common PCB materials at optimum speed
  • Three step lasing operation provide optimum hole quality i.e. YAG to remove copper, CO2  to remove dielectric and YAG to clean the copper pad
  • It is not practical to laser drill all the way through a board unless it is less than about 10 mils thick
Dual Beam UV/CO2 Laser Drill

Dual Beam UV/CO2 Laser Drill

Combination ND: YAG CO2

Forms holes by removing copper with the ND: YAG laser and the dielectric and re-enforcing material with the CO2 laser (Approximately 3,500 to 13,000 holes per minute)

C02 (Infrared)

Capable of drilling most re-enforcing materials and laminate resin systems. Not effective for drilling copper (copper is reflective in the infrared spectrum and must be window etched) Forms holes by pulsing a larger high energy beam (Approximately 17,000 holes per minute)

ND: YAG (Ultra-Violet)

Capable of drilling copper, all re- enforcing materials and all laminate resin systems. 25 to 50-micron beam forms holes by spiralling of trepanning the beam (Approximately 600 to 1,400 holes per minute)

Combination ND:YAG CO2

Combination ND:YAG CO2

ND:YAG  (Ultra-Violet)

ND:YAG  (Ultra-Violet)

Cerra Systems Printed Circuit Board Fabrication capabilities support high-frequency PCB, High-temperature Boards, Thick PCB, ultra-thin PCB, heavy copper PCB, Metal Core PCB, HDI boards with Blind Vias, Buried Vias, Micro Vias, Embedded passives, bonded heat sink, Impedance Control, Depth control drilling, Back drilling, Edge Plated PCB, Bump Pads, cavity with ledge, Via on pad and stacked micro-Via technology.

CerraSystems – http://cerrasystems.com

HDI PCB ,  Rigid Flex PCB,  RF PCB 

Electronics Manufacturing Partners:

Argus Systems (AESPL) –  www.sysargus.com

PCB,  PCBA,  Cable Assembly,  Box Build,  Testing

EMSxchange – www.EMSxhange.com, PCBA, Cable Assembly,  Box Build ,  Testing,  Logistics