Surface mounting type overvoltage and overcurrent protection device and manufacturing method thereof

An overvoltage and overcurrent protection, surface mount technology, used in overvoltage protection resistors, fuse manufacturing, emergency protection devices, etc., can solve the problems of small product capacitance, limited energy range, large printing area, etc. The effect of fast speed, improved reliability, and low cost

Active Publication Date: 2014-04-23
NANJING SART SCI & TECH DEV
View PDF9 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese Patent Application No. 200410104274.1 proposes a method of manufacturing a surface-mounted symmetrical structure overcurrent and overvoltage protector, and the overcurrent protection fuse element is surrounded by arc extinguishing material or arc shielding material, so that the product can protect the circuit from damage caused by relatively high voltage and high current; in addition, Chinese patent application number 200810215909.3 provides a method for manufacturing a glass ceramic ESD overvoltage protection device. This type of overvoltage protector has a low capacitance (<0.25pF), accurate Embedded (embedded voltage<50V), low leakage conductance, fast response, high stability and temperature resistance, etc., but because the electrostatic functional layer involved is a surface coating layer with a thickness of 5~30μm, the coating The printing area is generally relatively large and the thickness is thin, so the capacitance of the product cannot be made too small, and the range of energy it can withstand is also limited

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Surface mounting type overvoltage and overcurrent protection device and manufacturing method thereof
  • Surface mounting type overvoltage and overcurrent protection device and manufacturing method thereof
  • Surface mounting type overvoltage and overcurrent protection device and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] 1. Ingredients flow casting: select LTCC ceramic powder and pressure-sensitive ceramic material that meet the requirements to prepare slurry respectively. The sintering temperature of the two ceramic materials should be within the same temperature range, and their dielectric constant should be as small as possible. Generally, ceramic materials with a dielectric constant less than 10 are selected; LTCC ceramics can use common materials such as glass-ceramic systems or glass / ceramic composite systems, and mix them into qualified slurry through ball milling or sand milling, and then through casting process Obtain a certain width and thickness such as image 3 The shown LTCC ceramic diaphragm 61; the varistor functional phase 52 are mainly made of zinc oxide, tin oxide, strontium titanate and other materials with non-linear pressure-sensitive characteristics, mixed by ball milling, and the varistor ceramic powder, solvent, viscous Mixture and dispersant can be prepared into...

Embodiment 2

[0066] like Figure 11 As shown, according to the stacking sequence number described in step 8 in Example 1, the stacking method is changed to: a) stacking the lower protective layer 611 --> b) stacking the second electrode layer 43 --> c) stacking LTCC ceramics Diaphragm 5-->d) stacked first electrode layer 42-->e) stacked arc-extinguishing material coating 7-->f) stacked melt layer electrode pattern 41-->g) stacked arc-extinguishing material coating 7 -->f) Stacked melt layer electrode pattern 41 -->g) Stacked arc extinguishing material coating 7 -->h) Stacked first electrode layer 42 -->i) Stacked LTCC ceramic stacked diaphragm 5 --> j) stacking the second electrode layer 43 --> k) stacking the lower protective layer 612 to form a structure in which two layers of melt layer electrode patterns 41 are connected in parallel.

[0067] Others are made in the same manner as in Example 1.

Embodiment 3

[0069] like Figure 12 As shown, according to the stacking sequence number described in step 8 in Example 1, the stacking method is changed to: a) stacking the lower protective layer 611 --> d) stacking the first electrode layer 42 --> c) stacking LTCC ceramics Diaphragm 5-->b) stacked second electrode layer 43-->c) stacked LTCC ceramic stacked diaphragm 5-->d) stacked first electrode layer 42-->e) stacked arc-extinguishing material coating 7- ->f) Stacked melt layer electrode pattern 41-->g) Stacked arc-extinguishing material coating 7-->h) Stacked first electrode layer 42-->i) Stacked LTCC ceramic stacked diaphragm 5-->j ) stacking the second electrode layer 43 --> i) stacking the LTCC ceramic stack diaphragm --> h) stacking the first electrode layer 42 --> k) stacking the lower protective layer 612 to form an overvoltage and overcurrent protection device .

[0070] Others are made in the same manner as in Example 1.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides a surface mounting type overvoltage and overcurrent protection device and a manufacturing method thereof. The surface mounting type overvoltage and overcurrent protection device comprises a protection device body, wherein the left end and the right end of the protection device body are provided with end electrodes; the front side and the rear side of the protection device body are provided with side electrodes; at least one melt layer electrode, at least two first electrode layers and at least two second electrode layers are arranged inside the protection device body; the melt layer electrode is covered by an arc extinction material coating; through holes are formed between the first electrode layers and the second electrode layers; piezoresistor function phases are filled in the through holes. The surface mounting type overvoltage and overcurrent protection device is manufactured by the steps of molding LTCC (Low Temperature Co-Fired Ceramic) membranes, printing the melt layer electrode, printing electrode layer electrodes, printing the arc extinction material coating, forming the through holes in the LTCC stacked membranes, filling the piezoresistor function phases in the through holes, stacking according to the design, cutting to form a single product, sintering the product, forming the end electrodes and the side electrodes and the like. The surface mounting type overvoltage and overcurrent protection device has the advantages of low electric capacity, low leakage conductance current, rapid response speed, and high reliability and stability.

Description

technical field [0001] The invention relates to an overvoltage and overcurrent protection device, in particular to a protection device which can realize low-temperature co-firing and is suitable for surface mounting, and integrates overvoltage and overcurrent protection functions, and a manufacturing method of the device. Background technique [0002] With the rapid development of electronic technology and the upgrading of electronic products, people's requirements for product reliability and safety are increasing day by day. On various low-voltage electrical appliances, they are often impacted by surge currents caused by unexpected voltage transients, which will lead to deterioration of the performance of electronic products, prone to malfunction or even damage, and interfere with the normal operation of the system, eventually causing the entire machine The reliability performance of the equipment is reduced. Therefore, transient overcurrent and overvoltage protection are ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): H01H85/041H01H85/05H01H69/02H01C7/12H01C17/00
Inventor 南式荣刘明龙
Owner NANJING SART SCI & TECH DEV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap