Super-hard wear-resisting chromium-based compound coating micro drill bit for PCB (Printed Circuit Board) and preparation method thereof

A composite coating, composite layer technology, applied in the direction of coating, metal material coating process, layered products, etc., can solve the problem of low hardness of CrN coating, achieve low friction coefficient, reduce easy fracture, hardness and toughness improved effect

Inactive Publication Date: 2013-03-20
SHANGHAI CREWELL MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The coefficient of thermal expansion and modulus of elasticity are close to those of the PCB substrate, with good thermal matching and chemical matching, and good thermal stability, but the hardness of a single CrN coating is low

Method used

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  • Super-hard wear-resisting chromium-based compound coating micro drill bit for PCB (Printed Circuit Board) and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Firstly, take the PCB micro-drill of 0.4-0.6mm as the standard test sample of cemented carbide, and deposit the coating on the PCB micro-drill after degreasing, organic cleaning, rinsing and plasma cleaning. First set the temperature of the cemented carbide substrate (that is, the micro-drill to be deposited coating) at 200 o C, after the deposition process is set, it is controlled by the industrial computer. The substrate pulse bias frequency is 80KHz, the bias peak value is -800V, the duty cycle is 40%, the Ar flow rate is 40ml / min, the ion-plating Cr target is turned on, the arc current is set to 70A, and Cr ions are evaporated from the Cr target. The alloy substrate was bombarded and cleaned for 1 min; then the pulse bias was adjusted to the peak value -500V, the duty cycle was 40%, the Ar flow rate was 20ml / min, and the N 2 The flow rate is 200ml / min, and the ion-plating Cr target current is maintained at 60A. At this stage, Cr ions react with nitrogen to form CrN...

Embodiment 2

[0024] Take the hard alloy standard test sample with a diameter of 0.8-1.2mm PCB micro-drill, and deposit the coating after degreasing, organic cleaning, rinsing and plasma cleaning. The cemented carbide substrate temperature is set to 250 oC, after the deposition process is set, it is controlled by the industrial computer. The pulse bias frequency of the cemented carbide substrate is 80KHz, the bias peak value is -800V, the duty cycle is 40%, the Ar flow rate is 40ml / min, the ion-plating Cr target is turned on, the arc current is 70A, and the Cr ions are evaporated from the Cr target. The alloy substrate was bombarded and cleaned for 1 min; then the pulse bias was adjusted to the peak value -600V, the duty cycle was 40%, the Ar flow rate was 30ml / min, and the N 2 The flow rate is 300ml / min, and the ion-plating Cr target current is maintained at 70A. At this stage, Cr ions react with nitrogen to form CrN, thereby depositing a transition layer of CrN on the cemented carbide su...

Embodiment 3

[0026] Take a PCB micro-drill with a diameter of 1.3-2mm as a standard test sample of cemented carbide, and deposit a coating after degreasing, organic cleaning, rinsing and plasma cleaning. The cemented carbide substrate temperature is set to 300 o C, after the deposition process is set, it is controlled by the industrial computer. The substrate pulse bias frequency is 80KHz, the bias peak value is -800V, the duty cycle is 40%, the Ar flow rate is 40ml / min, the ion-plating Cr target is opened, the arc current is 70A, the Cr ions are evaporated from the Cr target, and the cemented carbide substrate is Bombardment cleaning for 1min; pulse bias adjusted to peak value -700V, duty cycle 40%, Ar flow rate 40ml / min, N 2 The flow rate is 400ml / min, and the ion-plating Cr target current is maintained at 80A. At this stage, Cr ions react with nitrogen to form CrN, thereby depositing a transition layer of CrN on the cemented carbide substrate, and plating CrN for 15 minutes; close the ...

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Abstract

The invention discloses a super-hard wear-resisting chromium-based compound coating micro drill bit for a PCB (Printed Circuit Board) and a preparation method thereof. An inner layer and an outer layer are respectively deposited on a hard alloy substrate by adopting an ion plating technology and improved magnetic filtering ion plating; the inner layer is a CrN transition layer and is combined with the hard alloy substrate to have very good calorific, hardness and chemical matching properties, so that the good bonding strength between the CrN transition layer and the substrate is guaranteed; and the outer layer is an AlCrTiN compound layer and has the characteristics of high hardness, strong toughness and low friction coefficient. A PCB micro drill bit of a compound coating, which has the advantages of strong bonding strength, high hardness, good toughness and low friction coefficient, is obtained by carrying out compound design on CrN and AlCrTiN and utilizing interface strengthening, solid solution strengthening, double-phase strengthening and nano strengthening.

Description

technical field [0001] The invention relates to the field of micro-drill nano-composite coatings for printed circuit boards (PCBs), in particular to a micro-drill of ultra-hard wear-resistant chromium-based composite coatings for PCBs and a preparation method thereof. [0002] Background technique [0003] With the transfer of the global information technology (IT) hardware manufacturing industry to China, China has become a global manufacturing base for printed circuit boards (PCBs), the core component of IT hardware. The quality of PCB micro-drills, which consume hundreds of millions of pieces each year, has become the core issue of PCB manufacturing technology innovation. With the development of the PCB industry, the speed of micro-drilling is increasing (60,000 rpm), the number of circuit board layers is increasing, and a large number of difficult-to-process halogen-free PCB boards are used, making the conditions for PCB molding and processing more stringent. [0004] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B9/04C23C14/32C23C14/06
Inventor 黄仕江
Owner SHANGHAI CREWELL MATERIAL TECH
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