In order to provide a chip resistor which has wide and flat terminal electrodes in its front surface and which has high connection reliability between front electrodes and the terminal electrodes, a chip resistor according to the present invention includes: an insulating substrate 1 shaped like a cuboid; a pair of front electrodes 2 provided on lengthwise opposite edge portions of a front surface of the insulating substrate 1; a resistor body 3 provided between the front electrodes 2; an insulating protection layer 4 covering entire surfaces of the front electrodes 2 and the resistor body 3; and a pair of terminal electrodes 5 provided on lengthwise opposite end surfaces of the insulating substrate 1. The chip resistor is configured such that the front electrodes 2 sandwiched between the insulating substrate 1 and the protection layer 4 are exposed from widthwise end surfaces and the lengthwise end surfaces of the insulating substrate 1, and the terminal electrodes 5 wrap around the widthwise opposite end surfaces of the insulating substrate 1 to be thereby connected to the exposed portions of the front electrodes 2.

In order to provide a chip resistor which has wide and flat terminal electrodes in its front surface and which has high connection reliability between front electrodes and the terminal electrodes, a chip resistor according to the present invention includes: an insulating substrate 1 shaped like a cuboid; a pair of front electrodes 2 provided on lengthwise opposite edge portions of a front surface of the insulating substrate 1; a resistor body 3 provided between the front electrodes 2; an insulating protection layer 4 covering entire surfaces of the front electrodes 2 and the resistor body 3; and a pair of terminal electrodes 5 provided on lengthwise opposite end surfaces of the insulating substrate 1. The chip resistor is configured such that the front electrodes 2 sandwiched between the insulating substrate 1 and the protection layer 4 are exposed from widthwise end surfaces and the lengthwise end surfaces of the insulating substrate 1, and the terminal electrodes 5 wrap around the widthwise opposite end surfaces of the insulating substrate 1 to be thereby connected to the exposed portions of the front electrodes 2.

The present invention relates to a chip resistor. A method of manufacturing a chip resistor comprising steps of: preparing an insulating substrate squarely segmented with vertical slits and horizontal slits, applying on the insulating substrate a conductive paste crossing over the horizontal slits, applying a resistor paste on the insulating substrate, forming trimming grooves to adjust resistivity of the resistor layers, and splitting the insulating substrate to form chip resistors, wherein the conductive paste comprises (i) a conductive powder comprising an agglomerated metal powder, wherein particle diameter (D50) of the agglomerated metal powder is 3 to 12 m and specific surface area (SA) of the agglomerated metal powder is 3.1 to 8.0 m.sup.2/g, (ii) a glass frit and (iii) an organic vehicle.

A thermal resistor includes a substrate, a thermistor, a front electrode, a passivation protection layer, and an external protection layer. The thermistor does not include an oxide and is made of a base metal. Therefore, it can reduce the production cost. The passivation protection layer is formed by sputtering, physical vapor deposition, or chemical vapor deposition, in which the passivation protection layer conformally covers a surface of the thermistor and can protect the underlying thermistor.

A thermal resistor includes a substrate, a thermistor, a front electrode, a passivation protection layer, and an external protection layer. The thermistor does not include an oxide and is made of a base metal. Therefore, it can reduce the production cost. The passivation protection layer is formed by sputtering, physical vapor deposition, or chemical vapor deposition, in which the passivation protection layer conformally covers a surface of the thermistor and can protect the underlying thermistor.

A method comprising: forming a polyimide layer; forming a thin film resistor on the polyimide layer; forming, on the thin film resistor and the polyimide layer, a metallization layer that includes metal contacts on opposing ends of the thin film resistor but leaves an exposed surface of the polyimide layer; baking the polyimide layer, the thin film resistor, and the metallization layer to remove water from the polyimide layer; forming, on the exposed surface of the polyimide layer, a hydrophobic moisture barrier layer that prevents absorption of water into the polyimide layer to avoid blistering of the thin film resistor during subsequent laser trimming of the thin film resistor; and laser trimming a resistance of the thin film resistor between the metal contacts.

A method comprising: forming a polyimide layer; forming a thin film resistor on the polyimide layer; forming, on the thin film resistor and the polyimide layer, a metallization layer that includes metal contacts on opposing ends of the thin film resistor but leaves an exposed surface of the polyimide layer; baking the polyimide layer, the thin film resistor, and the metallization layer to remove water from the polyimide layer; forming, on the exposed surface of the polyimide layer, a hydrophobic moisture barrier layer that prevents absorption of water into the polyimide layer to avoid blistering of the thin film resistor during subsequent laser trimming of the thin film resistor; and laser trimming a resistance of the thin film resistor between the metal contacts.

A method of sintering solderable base metals in air atmosphere and manufacturing alloy components to manufacture solderable electrodes by heat treatment instead of electroplating processes. The method involves introducing into an electrode plenty of metallic tin powder directly, then metallic aluminum powder with high-oxidation enthalpy formation to protect tin against oxidation, and other metals, say metallic copper powder, to produce copper-tin alloy to increase the melting point of the electrode. With the method, tin, as a base, directly functions as an electrode, covering the tin electrode with aluminum film to protect the tin electrode against oxidation during heat treatment, introducing appropriate metals, say copper, into the tin film to produce alloy from tin and copper to increase the melting point of the electrode. With electroplating processes replaced by heat treatment, electronic components, i.e., electrodes, are manufactured without any tin electroplating process but exhibit high solderability and excellent functionality.

A method of sintering solderable base metals in air atmosphere and manufacturing alloy components to manufacture solderable electrodes by heat treatment instead of electroplating processes. The method involves introducing into an electrode plenty of metallic tin powder directly, then metallic aluminum powder with high-oxidation enthalpy formation to protect tin against oxidation, and other metals, say metallic copper powder, to produce copper-tin alloy to increase the melting point of the electrode. With the method, tin, as a base, directly functions as an electrode, covering the tin electrode with aluminum film to protect the tin electrode against oxidation during heat treatment, introducing appropriate metals, say copper, into the tin film to produce alloy from tin and copper to increase the melting point of the electrode. With electroplating processes replaced by heat treatment, electronic components, i.e., electrodes, are manufactured without any tin electroplating process but exhibit high solderability and excellent functionality.

The invention relates to a sensor element comprising a sensor chip and an anisotropically conductive material, wherein the sensor chip has an electrically insulating substrate, at least two contact pads arranged on a first side of the electrically insulating substrate, and a resistor structure on the first side of the electrically insulating substrate, extending from a first contact pad to at least one other contact pad, wherein the resistor structure includes at least one trimmer structure. An anisotropically conductive material is directly or indirectly arranged on the first side of the electrically insulating substrate, at least on the at least one trimmer structure.