Conductive Inks

Conductive Ink ApplicationCreative Materials, Inc. makes numerous electrically conductive silver and carbon filled inks for the electronics and medical industries. Different applications require different inks. To help our potential customers select the appropriate ink for their applications, we gather pertinent information about the nature of a specific application; i.e., requirements of temperature, flexibility, and conductivity as well as method of application.

The electrical performance of the ink depends on which particular ink is used, based on the requirements of the application. We can offer screen-printable and pad-printable inks, with sheet resistivity as low as 0.0l ohms/square per mil (0.00l”) of thickness and as high as 1meg(million) ohms/square/mil.

There are a wide variety of substrates onto which the inks can be printed. Typical substrates are polyester film, polyimide film, and FR4 board. Films such as Dupont’s Mylar (polyester) and Dupont’s Kapton (polyimide) film are flexible and available in a variety of thicknesses. Mylar can withstand about 120°C before it distorts. Kapton can withstand 200°C without distorting. Picking the appropriate substrate depends on the maximum temperature the devices will need to withstand in operation or in further processing after the ink is applied and cured. FR4 board is a typical printed circuit board substrate. This type of material can withstand about 200°C (or higher) and is not flexible.

We have inks for a variety of different printing processes, including screen-printing, pad-printing and flexographic printing. Typically screen-printing or pad-printing is used for the printing of circuits, membrane switches, flexible heaters and medical electrodes. Pad-printing is especially useful in applying material to contoured or uneven surfaces. Flexograhic printing is used for all of the applications listed above, but with higher volumes. The printing accuracy will depend on the printing technique as well as experience of the printer.

The costing of inks is volume sensitive, pricing is by the gram and the cost is lower per gram, for large volumes. When asking for a quote, please give an estimate of volume usage.

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