Thin-film polymer multilayer capacitor element and method for manufacturing the same

Abstract

The objective is to provide a thin-film polymer multilayer capacitor element that successfully achieves miniaturization, high voltage, and high current. The present invention provides a thin-film polymer laminated capacitor element having a laminate formed by alternately stacking multiple dielectric layers and multiple internal electrode metal layers, and external electrodes formed at both ends in the longitudinal direction of the laminate, wherein each internal electrode metal layer has multiple metal regions separated by margins, forming an internal series structure having multiple capacitance appearance regions, and each metal region forming the internal series structure has an active length of 1.8 mm to 5.2 mm along the longitudinal direction.

Claims

1. A thin-film polymer laminated capacitor element having a laminate formed by alternately stacking multiple dielectric layers and multiple internal electrode metal layers, and a pair of external electrodes formed at both ends in the longitudinal direction of the laminate, Each of the internal electrode metal layers has a plurality of metal regions separated by a margin, and the margin has a length of 0.1 to 1.2 mm in the longitudinal direction of the laminate. Each of the aforementioned internal electrode metal layers has a deposition resistance value of 25 to 45 Ω / □. Each of the plurality of dielectric layers has a thickness of 0.4 to 0.8 μm and contains a polymer of a monomer having an acrylic group or a methacrylic group. The metal regions of the two adjacent internal electrode metal layers, separated by the dielectric layer, are offset in the longitudinal direction of the laminate, thereby forming an internal series structure having multiple capacitance appearance portions, the number of internal series connections in the internal series structure being 2 to 12, and The metal region forming the internal series structure has an active length of 1.8 mm to 5.2 mm along the longitudinal direction. Thin-film polymer multilayer capacitor element.

2. The thin-film polymer laminated capacitor element according to claim 1, wherein the dielectric layer comprises a polymer of a monomer having an acrylic group or a methacrylic group.

3. The thin-film polymer laminated capacitor element according to claim 1 or 2, wherein the metal region of the internal electrode metal layer forms a heavy edge at the end region on the external electrode side.

4. A thin-film polymer multilayer capacitor element according to claim 1 or 2, having a dielectric breakdown voltage (BDV) of 400 V / μm or more.

5. A thin-film polymer multilayer capacitor element according to claim 1 or 2, having an allowable ripple current of 0.4 Arms / μF or more.

6. The volume per unit energy (J) is 1.0 to 3.2 cm³. ３ The thin-film polymer laminated capacitor element according to claim 5, having and / or having 1,000 to 8,000 layers, with one dielectric layer and one internal electrode metal layer forming one layer.

7. A thin-film polymer multilayer capacitor element according to claim 1 or 2, for use with a voltage of 400 to 1200 VDC.

8. A method for manufacturing a thin-film polymer multilayer capacitor element, (a) Forming a dielectric layer, (b) Applying patterning oil to the dielectric layer and then depositing metal to form an internal electrode metal layer having a metal region separated by a margin, and (c) Forming a laminate by continuously and alternately repeating the formation of the dielectric layer and the formation of the internal electrode metal layer in a vacuum, Includes, The margin portion has a length of 0.1 to 1.2 mm in the longitudinal direction of the laminate. Each of the internal electrode metal layers has a deposition resistance value of 25 to 45 Ω / □. Each of the dielectric layers has a thickness of 0.4 to 0.8 μm and contains a polymer of a monomer having an acrylic group or a methacrylic group. In (c) above, an internal series structure is formed by stacking the two adjacent internal electrode metal layers such that the respective metal regions of the stacked material are offset in the longitudinal direction of the stacked material. The number of internal series connections in the aforementioned internal series structure is 2 to 12. And, The metal region forming the internal series structure has an active length of 1.8 mm to 5.2 mm along the longitudinal direction of the laminate. Characterized by, A method for manufacturing thin-film polymer multilayer capacitor elements.

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