Abstract:
PROBLEM TO BE SOLVED: To solve the problem that a flow process executed after a reflow soldering process causes a warp of a board, solder remelting, etc., due to heat from flow soldering, thus leading to the separation of an electronic component. SOLUTION: A semiconductor device includes a semiconductor chip having a plurality of electrodes, a plurality of leads connected electrically to the electrodes of the semiconductor chip via bonding wires, and a resin on which the semiconductor chip is mounted. The leads is composed of two or more kinds of leads different in rigidity. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
An interconnection contact structure assembly including an electronic component (102) having a surface and a conductive contact terminal (103) carried by the electronic component (102) and accessible at the surface. The contact structure (101) includes an internal flexible elongate member (106) having first (107) and second ends (108) and with the first end (107) forming a first intimate bond to the surface of the conductive contact terminal (103) without the use of a separate bonding material. An electrically conductive shell (116) is provided and is formed of at least one layer of a conductive material enveloping the elongate member (106) and forming a second intimate bond with at least a portion of the conductive contact terminal immediately adjacent the first intimate bond.
Abstract:
PROBLEM TO BE SOLVED: To provide a substrate mounted type electric connector capable of maintaining good solderability of a connection part of a terminal for a long period and preventing the occurrence of a whisker in a bent part of a terminal. SOLUTION: This electric connector is provided with a plurality of terminals 12 having a contact part 12b contacting with a mating contact at one end and a connection part 12e to be connected with a circuit board at the other end and having bent parts 12d at the intermediate segment between the contact part 12b and the connection part 12e, and an insulating housing 11 holding the plurality of terminals 12. A gloss tin plating layers 12f and a semigloss tin plating layer 12g are formed on each surface of the contact part 12b and the connection part 12e except the surface of the intermediate segment of each terminal 12 so that the semigloss tin plating layer 12g is thicker than the gloss tin plating layers 12f. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
A probe card (321) is provided for contacting an electronic component with raised contact elements. In particular, the present invention is useful for contacting a semiconductor wafer (310) with resilient contact elements (301), such as springs. A probe card (321) is designed to have terminals to mate with the contact elements on the wafer (310). In a preferred embodiment, the terminals are posts. In a preferred embodiment the terminals include a contact material suitable for repeated contacts. In one particularly preferred embodiment, a space transformer (324) is prepared with contact posts on one side and terminals on the opposing side. An interposer (325) with spring contacts (333, 334) connects a contact (335) on the opposing side of the space transformer (324) to a corresponding terminal (332) on a probe card (321), which terminal (332) is in turn connected to a terminal (331) which is connectable to a test device such as a conventional tester.
Abstract:
PROBLEM TO BE SOLVED: To provide a semiconductor package assembly having an improved contact structure. SOLUTION: A semiconductor assembly 611 includes; a substrate 612 made of an insulating material which has conductive contact pads formed on its first surface and second surface; a plurality of semiconductor devices 612 having contact pads opposite to the contact pads on the first and second surfaces of the substrate 612; a spring contact structure 626 for electrically interconnecting the contact pads of the semiconductor devices 612 and the contact pads held by the substrate 612 and for supporting the semiconductor devices at positions spaced from the surface of the substrate 612 such that the semiconductor devices 612 are placed on the first and second planes in parallel each other which are both sides of the substrate 612; and a contact means 616 held by the substrate 612 for forming an electrical contact to the semiconductor devices 612 through the contact structure 626. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
Provided are a bonded structure by a lead-free solder and an electronic article comprising the bonded structure. The bonded structure has a stable bonding interface with respect to a change in process of time, an enough strength and resistance to occurrence of whiskers while keeping good wettability of the solder. In the bonded structure, a lead-free Sn-Ag-Bi alloy solder is applied to an electrode through an Sn-Bi alloy layer. The Sn-Bi alloy, preferably, comprises 1 to 20 wt% Bi in order to obtain good wettability of the solder. In order to obtain desirable bonding characteristics having higher reliability in the invention, a copper layer is provided under the Sn-Bi alloy layer thereby obtaining an enough bonding strength.
Abstract:
PROBLEM TO BE SOLVED: To inexpensively prevent peeling of a land even when lead-free solder is used. SOLUTION: A wiring board is provided with a substrate 11 having a through hole 12, a first conductive film 13 coating the internal surface of the hole 12, and the land 15 formed on the surface of the substrate 11 around the opening of the hole 12 and composed of a second conductive film connected to the first conductive film 13. The wiring board is also provided with circuit wiring 16 formed on the surface of the substrate 11 and connected to the land 15, a protective film 17 covering the wiring 16, and a coating member 18 coating at least part of the outer peripheral edge 15A of the land 15. COPYRIGHT: (C)2004,JPO
Abstract:
A ceramic electronic component includes at least one component body having two end faces opposing each other and side faces connecting the two end faces, and terminal electrodes formed on the component body. Each of the terminal electrodes extends from each end face to edge portions of each side face of the component body. Each of the terminal electrodes includes a metal layer formed on at least each end face of the component body, a conductive resin layer for covering at least portions of the side faces of the component body, and a metal plating film covering the outer surface of the terminal electrode. The conductive resin layer extends from the metal layer including the edge of the metal layer to the portions of the side faces, and includes a conductive resin containing metal powder and resin. The thickness of the conductive resin layer above the side faces is at least about 10 mum.