Unlock instant, AI-driven research and patent intelligence for your innovation.

Connecting terminal

A technology for connecting terminals and plating layers, which is applied in the field of terminals constituting connectors. It can solve the problems of short circuit, increased contact resistance of terminals, and decreased wettability of solder alloys, etc., and achieves short circuit prevention, reduced contact resistance, and excellent wettability. Effect

Inactive Publication Date: 2009-12-30
ORMON CORP
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the conventional connection terminals obtained by the above-mentioned technology, there is a problem that metal whiskers (whiskers) are generated and come into contact with adjacent connection terminals, causing a short circuit.
In addition, there is also a problem that the wettability of the solder alloy to the connection terminal is reduced, or the contact resistance of the terminal is increased.

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
  • Connecting terminal
  • Connecting terminal
  • Connecting terminal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] to have image 3 Copper base material of the shape shown (full length ( image 3 L) about 4 mm) were sequentially performed as follows to obtain connection terminals.

[0052] Electrolytic degreasing

[0053] Immerse the entire surface of the base material in a 5% alkaline cleaner for 10 seconds and dry it.

[0054] acid active treatment

[0055] The entire surface of the base material after the electrolytic degreasing treatment was immersed in a 5% sulfuric acid aqueous solution for 10 seconds, and dried.

[0056] Nickel plating

[0057] The entire surface of the base material after the acid activation treatment was subjected to nickel plating under the conditions in Table 1 (nickel layer thickness: 2 μm).

[0058] Tin plating

[0059] For both ends of the base metal after nickel plating (in detail, image 3 The X area and Y area) were sequentially tin-plated under the conditions in Table 1 (tin-plating thickness: 2 μm).

[0060] Table 1

[0061] proc...

Embodiment 2 and Embodiment 3、 comparative example 1 and 2

[0069] Connection terminals were obtained in the same manner as in Example 1 except that the reflow treatment conditions were changed to those described in Table 3.

[0070] table 3

[0071]

[0072] Physical property evaluation

[0073] The X area in the analyzed connection terminal (refer to image 3 ) plating layer structure.

[0074] Occupied area ratio

[0075] The area ratio (Sn:Ni—Sn) of the surface obtained by peeling off the surface tin oxide layer was measured.

[0076] Pure tin content

[0077] The pure tin content of the layer directly under the surface tin oxide layer was measured.

[0078] Layer structure and thickness

[0079] The layer structure and the thickness of each layer were measured (analytical conversion) by scanning Auger electron spectroscopy (manufactured by JEOL Ltd.). That is, measurement by Auger electron spectroscopy and argon ion etching (etching depth: about 1 nm) were repeated, and the layer structure and thickness were checked base...

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

PropertyMeasurementUnit
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

To provide a connector terminal which effectively prevents the occurrence of short circuit and increase of contact resistance at the portion where mechanical compression stress is applied, and which is superior in wettability of a solder alloy at the portion where soldering is performed. The connector terminal has a plated layer structure having a pure nickel layer, a nickel-tin intermetallic compound layer, a mixed layer consisting of a nickel-tin intermetallic compound and pure tin, and a tin oxide layer in order on a matrix at a portion where a mechanical compression stress is applied, and part of the nickel-tin intermetallic compound in the mixed layer contacts the tin oxide layer.

Description

technical field [0001] The present invention relates to a terminal constituting a connector, and more particularly, to a connection terminal having a portion to which mechanical compressive stress is applied for electrical connection with other components such as a flexible substrate. Background technique [0002] The terminals constituting the connector are usually plated over the entire surface. As the plating treatment, it is known that a tin layer is formed on a nickel layer and then a reflow treatment is performed from the viewpoint of improving corrosion resistance and sliding properties (for example, Patent Document 1 and Patent Document 2). [0003] However, in the conventional connection terminals obtained by the above technique, there is a problem that metal whiskers (whiskers) are generated and come into contact with adjacent connection terminals, causing a short circuit. In addition, there is also a problem that the wettability of the solder alloy connecting the...

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 Patents(China)
IPC IPC(8): C25D5/02C25D5/12H01R43/16
CPCC25D5/02C25D5/12H01R4/58H01R43/16Y10S439/93
Inventor 铃木雅史立石圭一郎小笠弘之
Owner ORMON CORP