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China factories

China factory - DQS Electronic Co., Limited

DQS Electronic Co., Limited

  • China,Shenzhen
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  3. Double Side Countersink Hole PCB for Consumer Electronics
China Double Side Countersink Hole PCB for Consumer Electronics
China Double Side Countersink Hole PCB for Consumer Electronics

  1. China Double Side Countersink Hole PCB for Consumer Electronics

Double Side Countersink Hole PCB for Consumer Electronics

  1. MOQ： 1
  2. Price： Contact us
  3. Get Latest Price
Payment Terms T/T
Layer 2 Layer
Base Material Fr4
Thickness 0.8 mm
Copper Thickness 1.5 OZ
Board Size Customized
Min. Line Width/Space 0.10/0.10mm
Surface Treatment ENIG/Immersion Gold
Certificate UL,IATF16949,ISO&Reach

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  1. Product Details
  2. Company Details

Product Specification

Payment Terms T/T Layer 2 Layer
Base Material Fr4 Thickness 0.8 mm
Copper Thickness 1.5 OZ Board Size Customized
Min. Line Width/Space 0.10/0.10mm Surface Treatment ENIG/Immersion Gold
Certificate UL,IATF16949,ISO&Reach
High Light double side countersink PCB ，countersink hole PCB for electronics ，PCB manufacturing with countersink

 Double Side Countersink Hole PCB for Consumer Electronics



♦ What's Countersink Hole PCB?


A Countersink Hole PCB is a printed circuit board whose mounting or component holes are machined with a conical flare at the top, allowing flat-head screws or connectors to sit flush with (or slightly below) the board surface instead of protruding.



♦ Key Points of Countersink Hole PCB?


     

  1. Geometry
    • A two-step hole: the smaller pilot hole goes through the board, while the larger conical section is cut to a specific angle—typically 82°, 90° or 120°—so the screw head matches the taper.
  2. Purpose
    • Eliminates screw-head stand-off, saving vertical space and preventing short circuits to nearby enclosures or shields
    • Improves mechanical strength by distributing clamping force over a larger bearing area
    • Gives a neat, planar appearance for card-edge guides, front panels or RF shields
  3. Design parameters
    • Major diameter (D2): the top countersink diameter, chosen to clear the screw head
    • Minor diameter (D1): the drilled hole for the screw shank or plated via
    • Depth (h): usually controlled to leave ≥ 0.2 mm of PCB material below the taper to avoid breakout
    • Angle (θ): must match the screw head angle (common metric/Imperial screws use 90°)
  4. Manufacturing
    • Done after normal drilling but before plating: a precision CNC cutter or secondary drilling station forms the cone; burrs are removed and the board is cleaned before electroless copper
    • If the countersink intersects a plated via, the via is plugged or tented to prevent solder leakage during reflow
  5. Typical applications
    • Edge-mounted connectors, power devices secured with flat-head screws, RF modules, LED boards that must sit flush against heat-sinks, or any assembly where height clearance is critical




♦ Technical Parameters


Item

Specification

Laers

1~64

Board thickness

0.1mm-10.0mm

Material

FR-4,CEM-1/CEM-3,PI,High Tg,Rogers

Max panel size

32"×48"(800mm×1200mm)

Min hole size

0.075mm

Min line width

3mil(0.075mm)

Surface finish

OSP,HASL,Imm Gold/Nickel/Ag, Electric gold

Copper thickness

0.5-15 OZ

Soldermask

Green/Yellow/Black/White/Red/Blue 

Silkscreen

Red/Yellow/Black/White

Min PAD

5mil(0.13mm)

Inter package

Vacuum

Outer package

Carton

Outline tolerance

±0.75mm

Hole tolerance

PTH:±0.05 NPTH:±0.025

Certificate

UL,ISO 9001,ISO14001,IATF16949

Special request

Blind hole+Gold finger  + BGA

Material Suppilers

 Shengyi, KB, Nanya, ITEQ,etc.




♦ One-Stop PCBs Solution


PCB Prototype Felx PCB  Rigid-Flex PCB Aluminium PCB
Heavy Copper PCB HDI PCB High Frequency PCB  High TG PCB





♦ Advantages of DQS Team
  1. On-time Delivery:  
    • Owned PCBA factories 15,000 ㎡
    • 13 fully automatic SMT lines 
    • 4 DIP assembly lines


     2. Quality Guaranteed:

    • IATF, ISO, IPC, UL standards 
    • Online SPI, AOI, X-Ray Inspection 
    • The qualified rate of products reach 99.9%


     3. Premium Service:

    • 24H reply your inquiry
    • Perfect after-sales service system
    • From prototype to mass production


Company Details

Bronze Gleitlager

,

Bronze Sleeve Bushings

 and 

Graphite Plugged Bushings

 from Quality China Factory

  • Business Type:

    Manufacturer

  • Employee Number:

    >800

  • Ecer Certification：

    Verified Supplier

DQS Electronic is located in Shenzhen, focusing on PCB Layout Design, PCB Fabrication, Electronic Components Sourcing, SMT, PCB Assembly and Testing. We are a one-stop EMS electronic manufacturing company committed to providing global customers with rapid prototyping and mass production. Our produ... DQS Electronic is located in Shenzhen, focusing on PCB Layout Design, PCB Fabrication, Electronic Components Sourcing, SMT, PCB Assembly and Testing. We are a one-stop EMS electronic manufacturing company committed to providing global customers with rapid prototyping and mass production. Our produ...

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Get in touch with us

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  • DQS Electronic Co., Limited
  • Yasen Industrial Park, Baolong Street, Longgang District, Shenzhen
  • https://www.pcbs-board.com/

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