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A method for preparing a slurry of PESD core material

A slurry and core material technology, applied in the field of electrostatic discharge suppressor preparation, can solve the problems of loss of leftover material process time, reduced component performance, poor component stability, etc., to achieve short response time, small parasitic capacitance, clamping low voltage effect

Inactive Publication Date: 2019-01-22
NANJING SART SCI & TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, on the one hand, the three-roll mill has certain risks, and a large amount of air will be introduced while preparing the slurry, which will reduce the performance of components; on the other hand, the three-roll mill has good shear Although the solid powder can be dispersed in the organic carrier, this dispersion not only needs to consume a lot of scraps but also takes a long time to process
In addition, the conductive powders used to prepare core materials are mainly metals such as silver, copper, nickel and aluminum. Although metal powders have good conductivity, their oxidation resistance is poor and the cost is relatively high, so that the component Poor stability and high cost

Method used

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  • A method for preparing a slurry of PESD core material
  • A method for preparing a slurry of PESD core material
  • A method for preparing a slurry of PESD core material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Step 1: According to the requirement of preparing the slurry, calculate the required mass of each substance, wherein the dispersant needs 0.17g, the toughening agent needs 0.86g, and the weights of terpineol, ethylene glycol butyl ether and ethanol are respectively 7.65 g, 10.95g, 20.79g, SiO 2 and the mass of conductive powder are 34.11g and 35.89g respectively;

[0028] Step 2: Prepare a premix solution, dissolve 0.17g of dispersant and 0.86g of toughening agent in an organic solvent, and mix the uniform premix for later use; wherein, the dispersant is polyvinylpyrrolidone, the toughening agent is ethyl cellulose, and the organic solvent A mixture of terpineol, butyl glycol ether and ethanol is used;

[0029] Step 3: prepare slurry Ⅰ, mix the homogeneous premix and 34.11g SiO 2 powder, put it into an agate ball mill jar, and then put 68.22g of agate balls into it, and then ball mill to prepare slurry I with excellent dispersion properties; the ball milling speed is ...

Embodiment 2

[0034] Step 1: According to the requirement of preparing the slurry, calculate the required mass of each substance, wherein the dispersant needs 0.36g, the toughening agent needs 1.82g, and the weights of terpineol, ethylene glycol butyl ether and ethanol are respectively 7.65 g, 22.95g, 38.25g, SiO 2 and the mass of conductive powder are 36.32g and 37.89g respectively;

[0035] Step 2: Prepare the premix, dissolve 0.36g of dispersant and 1.82g of toughening agent in an organic solvent, and mix the uniform premix for later use; wherein, the dispersant is polyethyleneimine, the toughening agent is ethyl cellulose, organic Solvent adopts the mixture of terpineol, ethylene glycol butyl ether and ethanol;

[0036] Step 3: Prepare slurry Ⅰ, mix the uniform premix and SiO 2 powder, put it into an agate ball mill jar, and then put 72.64g of agate balls into it, and then ball mill to prepare slurry I with excellent dispersion properties; the ball milling speed is 160r / min-180r / min, ...

Embodiment 3

[0045] Step 1: Calculate the required mass of each substance according to the requirements of preparing the slurry, wherein the dispersant needs 0.97g, the toughening agent needs 0.3866g, and the weights of terpineol, ethylene glycol butyl ether and ethanol are respectively 7.65 g, 7.65g, 7.65g, SiO 2 and the mass of conductive powder are 38.66g and 37.78g respectively;

[0046] Step 2: Prepare a premix solution, dissolve 0.97g dispersant and 0.3866g toughening agent in an organic solvent, and mix the uniform premix solution for later use; wherein, the dispersant is polyvinylpyrrolidone, the toughening agent is ethyl cellulose, organic Solvent adopts the mixture of terpineol, ethylene glycol butyl ether and ethanol;

[0047] Step 3: Prepare slurry Ⅰ, mix the uniform premix and SiO 2 powder, put it into the agate ball mill jar, and then put 77.32g of agate balls into it, and then, ball mill to prepare slurry I with excellent dispersion performance; the ball milling speed is 1...

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Abstract

The invention discloses a slurry preparation method of PESD core material, comprising the following steps: preparing a premixed liquid, dispersing a dispersant and a toughening agent, and dissolvingthe premixed liquid in an organic mixed solvent; The organic mixed solvent is the mixture of terpineol, ethylene glycol butyl ether and ethanol; The slurry I with good dispersibility is prepared by ball milling of SiO2 powder and premixed liquid. The slurry I is prepared by ball milling of SiO2 powder and premixed liquid. Pouring slurry I into a weighed beaker, uniformly stirring with a glass rod,slowly pouring the weighed conductive powder into the beaker, uniformly stirring, and mixing with a solder paste stirrer to obtain slurry II; The prepared slurry II is heated in a water bath until the ethanol is completely volatilized. A low-viscosity slurry is prepared by using ethanol as solvent, that slurry is dispersed by a stirrer, and then ethanol is distilled out to obtain a slurry with good dispersion performance, and leftover material is not lost, cost is saved, and inorganic pow is used as the conductive phase of the core material to avoid the problem of oxidation of the conductivepowder.

Description

technical field [0001] The invention belongs to the technical field of preparation of electrostatic discharge suppressors, and relates to a preparation process of a core material functional slurry of a patch type polymer electrostatic discharge suppressor (PESD) by using a thick film process. Background technique [0002] Electrostatic discharge (ESD) refers to a phenomenon in which two objects with different potentials approach or contact each other when charge transfer occurs, and the insulating medium between the two is broken down. ESD is an instantaneous discharge phenomenon that can reach kilovolts. The discharge generates a huge electromagnetic field instantly, which interferes with other electronic equipment, shortens the service life of electronic products, and reduces the reliability of electronic equipment. [0003] With the continuous development of electronic communication technology and surface mount technology SMT (Surface Mount Technology), high-density, mini...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L27/02
CPCH01L27/0248
Inventor 南式荣杨漫雪郭林
Owner NANJING SART SCI & TECH DEV