DIES Products & Process

Product & Process

Natural Diamond

Advantages

Advantages of Natural/Mono diamond dies.

  • Rough-stone machining with a special method Rough stones are precision machined with our proprietary special method to achieve the best abrasion resistance.
  • Excellent wire gloss and surface The precisely polished inner-hole surface gives the drawn wire outstanding gloss and surface quality.
  • Produces ultra-fine wire down to 0.015 An ultra-precision die that can stably draw ultra-fine wire down to the 0.015 mm class.
  • Accurate dimensional precision Full inspection maintains consistent and accurate dimensional precision.

Applications

Application fields of Natural/Mono diamond dies.

  • Bonding wire

    Bonding wire Gold, Cu, AL

    Gold, copper and aluminum ultra-fine bonding wire used in semiconductor packaging

  • Stainless steel wire

    Stainless steel wire

    Wire drawing of stainless steel wire requiring high strength

  • Saw wire

    Saw wire

    Saw wire for cutting silicon and solar wafers

  • Copper wire

    Copper wire

    Wire drawing of copper wire for cables and electronic components

  • Medical wire

    Medical wire

    Ultra-precision ultra-fine wire for medical devices

  • EDM wire

    EDM wire

    Precision wire for electrical discharge machining (EDM) equipment

Manufacturing process

The manufacturing process of Natural Diamond Dies.

Selecting natural diamond rough stones photo
STEP 01

Selecting natural diamond rough stones

  • Rough-stone selection
  • 1/10
  • 1/15
  • 1/18
  • 1/25
  • 1/30
Flat polishing process photo
STEP 02

Flat polishing process

Flat polishing of natural diamond

  • Both flat faces of the single-crystal diamond are polished along the grain direction
Sintering Process photo
STEP 03

Sintering Process

  • Sintering POWER (toughness, rigidity)
  • Temperature, precise pressure, time (shock absorption, thermal conductivity)
  • Affects die life
Precision Machining Process photo
STEP 04

Precision Machining Process

  • Centering / leveling
  • Roughing, finishing, taper work
  • CASE work
Forming LASER Drilling Process photo
STEP 05

Forming LASER Drilling Process

  • In-house development of 273 DATA Programs
  • Forming and drilling of Mouth, Approach, Reduction, Back
  • Ultra-precision work maintained under constant temperature and humidity

Controlled Area

Mouth Enlargement Process photo
STEP 06

Mouth Enlargement Process

  • Automatic machine
  • First process of finished product
  • Machining of the wire inlet (Mouth) (50~80°)
  • Back, Exit (50°~80°) machining
1st and 2nd enlargement process photo
STEP 07

1st and 2nd enlargement process

  • Size roughing, medium roughing work
  • Automatic machining machine, manual polishing machine, automatic polishing machine
  • Approach (20 ± 50°), Reduction (10 ~ 30°)
Ultrasonic Polishing Process photo
STEP 08

Ultrasonic Polishing Process

  • Precision and gloss polishing of the bore surface
  • Ultrasonic polishing machine, automatic angle pin change
Polishing (bearing process) photo
STEP 09

Polishing (bearing process)

  • Bearing work (10~60°)
  • Final wire-diameter work (precision 5/10,000mm)
Visual Inspection / Cleaning Process photo
STEP 10

Visual Inspection / Cleaning Process

  • Visual inspection: roundness, surface condition, bubbles, ring, reduction curvature
  • Ultrasonic cleaning: removal of foreign matter
Quality Inspection Process photo
STEP 11

Quality Inspection Process

  • Size inspection: Conoptica full inspection (5/10,000mm)
  • Geometry: Conoptica sampling inspection (5%)
View Quality Inspection Details
ND DIES Finished Product photo
STEP 12

ND DIES Finished Product

The finest defect-free, high-quality Natural Diamond Dies

Standard specification

The standard specification of Natural Diamond Dies.

Diamond die cross-section diagram — Mouth, Approach, Reduction, Bearing, Back & Relief, Exit
Standard specification by section — Stainless Steel Wire, Stranded Wire, A/L Wire
Category Stainless Steel Wire Stranded Wire A/L Wire
Mouth(α)60° ± 20°70° ± 20°80° ± 20°
Approach30° ± 5°35° ± 5°35° ± 5°
Reduction14° ± 2°16° ± 2°20° ± 2°
Bearing30~50% D20~40% D20~40% D
Back & Relief15° ± 5°15° ± 5°20° ± 5°
Exit50° ± 20°50° ± 20°50° ± 20°