Thick Film Paste

Thick film paste consists of metal powder, glass powder, inorganic oxide powder, resins, etc., dispersed in an organic solvent according to required functionality. It is used as electrodes, resistors, and insulators in small electronic components.
The properties of thick film paste need to meet requirements such as electrical properties, uniform dispersibility, smoothness and adhesion during drying, and shrinkage characteristics during sintering. Sumitomo Metal Mining possesses manufacturing and paste technology for the metal powders used in thick film paste and provides thick film paste that matches customers’ applications.

*TCR (Temperature Coefficient of Resistance):
TCR indicates the degree to which the resistance value of a resistor changes with temperature variations. A smaller TCR value means that the resistance value is stable against temperature changes, making electronic devices less affected by temperature.

*ESD (Electrostatic Discharge):
ESD refers to the sudden discharge of accumulated static electricity, which can have harmful effects on electronic components and circuits. ESD measures are important in the design and manufacturing of electronic devices.

Sumitomo Metal Mining’s thick film paste main product lineup includes paste for chip resistors widely recognized as industry standards, MLCC* electrode paste customized to customer requirements, and conductive adhesives used for die-attach chip components in IC and LED assemblies.

Additionally, thick film pastes tailored to customer requirements are also developed.
・Conductive Paste：Forms conductors using Au, Ag, Pd, Ni, Cu, etc., as conductive materials.
・Resistive Paste：Forms resistors containing Ru.
・Insulating Paste：Forms insulators protecting circuits mainly composed of glass or resin.
・Resin Paste：Resin remains after solidification for adhesion, etc.

If the product you are looking for is not in our lineup, please feel free to contact us.

*MLCC (Multilayer Ceramic Capacitor)
MLCC is a capacitor made by layering multiple ceramic layers and metal electrodes. It has high reliability and excellent performance, widely used in electronic circuit applications. It is characterized by being small and having a large capacity.

*IC (Integrated Circuit)
IC refers to an integrated circuit where passive and active components are integrated inseparably on a single substrate.

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Used as electrodes, resistors, insulator paste in small electronic components. Highly regarded as industry standards, paste for chip resistors, MLCC electrode paste customized to customer requirements, and conductive adhesives used for die-attach chip components in IC and LED assemblies.

To demonstrate stable performance in wide temperature environments due to the spread of mobility and IoT, the demand for reliable electronic components capable of performing under extreme temperature conditions has increased. Resistors play an important role in electronic components for tasks such as current control, voltage distribution, and signal processing.

By combining the properties of metals and semiconductors, the TCR value, a characteristic of resistors, can be stabilized, making it applicable in various uses.

Sumitomo Metal Mining’s high-precision TCR resistive paste provides stable performance over a wide temperature range and can be applied not only to mobility-related electronic components but also to a variety of uses. For specific TCR value control examples, please refer to the case studies

Stabilizing Electronics in Harsh Temperatures