{"id":2738,"date":"2020-05-19T15:52:57","date_gmt":"2020-05-19T06:52:57","guid":{"rendered":"https:\/\/connect.nissha.com\/filmdevice\/?page_id=2738"},"modified":"2024-12-20T19:01:41","modified_gmt":"2024-12-20T10:01:41","slug":"patterning-cuni","status":"publish","type":"page","link":"https:\/\/connect.nissha.com\/filmdevice\/en\/patterning-cuni\/","title":{"rendered":"Patterning of Cu alloy thin film"},"content":{"rendered":"
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Sensor modules such as strain gauges and temperature sensors are generally sold as standard products.
However, there are many cases where the specifications of such off-the-shelf products limit the design in developing new products.

NISSHA is capable of patterning Cu alloy thin films used in such sensors. We support customers’ product development with wiring narrowing technology that can be realized only by processing thin films with a thickness of 1 \u03bcm or less.<\/p>\n<\/div>\n<\/div>\n

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NISSHA Cu alloy patterning<\/h2>\n
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Patterning of Cu alloy thin film of 0.1-0.2\u03bcm metal thickness<\/h4>\n

The Cu alloy thin film sputtered on PET film is patterned by photo-etching.
Compared with general alloy foil, the metal thickness is about 1\/20, and a higher resistance pattern can be formed.<\/p>\n<\/div>\n

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Mass production by roll-to-roll method<\/h4>\n

We mass-produce patterns on a roll film with a film width of 500mm.
Therefore, you can manufacture not only individual sensor parts, but you can also design more freely by laying out multiple sensors on one sheet.<\/p>\n<\/div>\n

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Module processing not only for patterning<\/h4>\n

We will undertake not only patterning but also various processes to complete the sensor module.
\n\u3000-Insulation coating of patterning layer
\n\u3000-Printing of Ag circuit
\n\u3000-FPC bonding
\n\u3000-Bonding with housing parts<\/p>\n<\/div>\n

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See details\"\"<\/a><\/p>\n<\/div>\n<\/div>\n<\/div>\n

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Processing example of Cu alloy<\/h2>\n
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Constantan<\/h4>\n

Copper-nickel alloys containing approximately 50% Ni are called constantan.

\nConstantan has a higher resistivity than copper and has a smaller temperature dependence of resistance, so it is used for products that require precise resistance characteristics such as strain gauges. Constantan is also known as a thermocouple electrode material combined with a copper electrode.<\/p>\n

Resistivity of wiring alloy<\/strong><\/p>\n\n\n\n\n\n\n
<\/th>\nResistivity(Ωm)<\/th>\n<\/tr>\n
Copper(Cu)<\/td>\n1.7*10-8<\/sup><\/td>\n<\/tr>\n
Constantan(Cu:Ni=55:45)<\/td>\n4.9*10-7<\/sup><\/td>\n<\/tr>\n
Nichrome(Ni:Cr:Mn=77.5:20:2.5)<\/td>\n1.5*10-6<\/sup><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
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Examples of using Constantan<\/h2>\n
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Strain gauge
-High resistance thin film can reduce the distance between terminals-<\/h4>\n

A CuNi thin metal with a thickness of 0.1 to 0.2 \u03bcm is a material with higher resistance than a general copper alloy foil with a thickness of about 3 \u03bcm.

\nFor example, the resistance of a 0.15-\u03bcm-thick CuNi thin metal is 20 times that of a 3-\u03bcm-thick CuNi foil. In addition, Nissha’s processing process enables line \/ space = 20 \/ 20\u03bcm fine line patterning.

\nUsing a high-resistance thin metal and narrowing the line width shortens the wiring distance between terminals of the strain gauge. The gauge can be narrowed.<\/p>\n<\/div>\n

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<\/th>\nSetting conditions<\/th>\nRequired terminal distance<\/th>\n<\/tr>\n
Film thickness<\/th>\nSet resistance value<\/th>\nLine width<\/th>\n<\/tr>\n
CuNi foil pattern<\/td>\n3µm<\/td>\n120Ω<\/td>\n100µm<\/td>\n73mm<\/td>\n<\/tr>\n
NISSHA CuNi thin film pattern<\/td>\n0.15µm<\/td>\n120Ω<\/td>\n20µm<\/td>\n0.7mm<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
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As a pressure sensor<\/h4>\n

It has been used as a pressure sensor for mobile terminals.

\nIt can also be used for displays with touch panels, information devices, and game consoles.<\/p>\n<\/div>\n

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Displacement measurement, vibration measurement sensor<\/h4>\n

Supports sensor customization for applications such as infrastructure deterioration diagnosis, load monitoring of cars and bicycles, and load cells.<\/p>\n<\/div>\n

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