Abstract: An electronic component package of an embodiment of the disclosure includes a base, a first plated layer, a first electronic component chip, a second plated layer, and a second electronic component chip. The base includes a first surface and a second surface. The first plated layer covers the first surface. The first electronic component chip is provided on the first plated layer with a first insulating layer being interposed therebetween. The second plated layer covers the second surface. The second electronic component chip is provided on the second plated layer with a second insulating layer being interposed therebetween. The first plated layer and the second plated layer each include a first metal material that is less likely to undergo an ion migration phenomenon than silver (Ag).

Abstract: A magnetic sensor device comprises a magnetic sensor chip that has a substantially rectangular shape and that contains a magnetic sensor element; and a sealing body, which is composed of a resin material containing magnetic particles and that integrally seals the chip. The chip includes a first and second side surfaces which are mutually opposite to each other, and a third and fourth side surfaces which are mutually opposite to each other and orthogonal to the first and second side surfaces. The sealing body contains first to forth sealing parts. The thicknesses of the first and second sealing parts are smaller than the particle diameter of the particles, and the thickness of at least the third sealing part is larger than the particle diameter of the particles. The particles exist in at least the third sealing part and substantially do not exist in the first and second sealing parts.

Abstract: A magnetic sensor device comprises a magnetic sensor chip that has a substantially rectangular shape and that contains a magnetic sensor element; and a sealing body, which is composed of a resin material containing magnetic particles and that integrally seals the chip. The chip includes a first and second side surfaces which are mutually opposite to each other, and a third and fourth side surfaces which are mutually opposite to each other and orthogonal to the first and second side surfaces. The sealing body contains first to forth sealing parts. The thicknesses of the first and second sealing parts are smaller than the particle diameter of the particles, and the thickness of at least the third sealing part is larger than the particle diameter of the particles. The particles exist in at least the third sealing part and substantially do not exist in the first and second sealing parts.

Abstract: An optical head including a housing that supports an objective lens driving device, which drives an objective lens. A main-shaft and sub-shaft support the housing such that the housing slides along a radial direction of an optical recording medium along the main-shaft and the sub-shaft. A main-bearing is formed on the housing that supports the main-shaft so that the main-shaft can slide free through the main-bearing. A sub-bearing is formed on the housing and supports the sub-shaft so that the sub-shaft can slide free through the sub-bearing. At least one slot is formed in the sub-bearing at a portion that contacts the sub-shaft.

Abstract: Housing 12 which constitutes an optical head is provided with the main-bearing which slides a main-shaft free and supports it, and sub-bearing 16 which slides sub-shaft 3 free and supports it. And slots 24 and 25 are formed in the portion which touches sub-shaft 3 in sub-bearing 16.