Abstract:
To prevent reduction in current-carrying capacity due to a reduced diameter of a probe, a probe unit includes the followings: a plurality of large diameter probes; a plurality of small diameter probes having diameters smaller than those of the large diameter probes; a large-diameter probe holder that includes a plurality of large hole portions which individually hold the large diameter probes, and a plurality of reception hole portions which have diameters smaller than those of the large hole portions, communicate with any one of the large hole portions, and receive end portions of the small diameter probes so that the end portions come into contact with the large diameter probes, while a set of the large hole portion and the reception hole portion that communicate with each other pierces through the large-diameter probe holder in a thickness direction; and a small-diameter probe holder that includes a plurality of small hole portions which individually hold the small diameter probes while preventing the small diameter probes from coming off and which pierce through the small-diameter probe holder, and that is stacked on the large-diameter probe holder so that each small hole portion communicates with any one of the reception hole portions. The central axes in a longitudinal direction of the large hole portion and the small hole portion that communicate with each other are separated from each other, and the small hole portions include two small hole portions which are adjacent to each other and of which central axes are separated from each other by a distance shorter than a distance between the central axes of two large hole portions that are corresponding to the two small hole portions.
Abstract:
Provided herein are a spring wire rod that can ensure conductivity capable of dealing with a high-frequency signal having a frequency of equal to or higher than 1 GHz while ensuring a spring characteristic, a contact probe using the spring wire rod, and a probe unit using the contact probe. The spring wire rod includes a wire core that is made of a conductive material having an electrical resistivity of equal to or slower than 5.00 × 10 -8 Ω•m, and a coating member 3 that is made of a spring material having a longitudinal elastic modulus of equal to or higher than 1.00 × 10 4 kgf/mm 2 and coats an outer circumference of the core. A coating thickness d of the coating member is smaller than a minimum value r of a distance between the center of gravity of a transverse cross section of the core and the outer edge of the transverse cross section.
Abstract:
To provide an easily manufactured conductive contact holder and a conductive contact unit capable of supporting a high frequency signal and a highly integrated and downsized inspection object, and a method of manufacturing the conductive contact holder. To achieve the object, there is provided a holder substrate made of a conductive material and having an opening for holding a conductive contact for inputting and outputting a signal to and from a circuit structure and a holding member formed by filling the opening with an insulating material, smoothing the surface of the insulating material, and forming a hole through the insulating material for inserting the conductive contact.
Abstract:
An elastic member according to the present invention is an elastic member formed of a wire having a cross section that is substantially circular, the cross section being orthogonal to a longitudinal direction, and the elastic member being expandable and contractible in a predetermined direction; and including: a first alloy portion that is made of an aluminum alloy having a tensile strength larger than 950 MPa and equal to or less than 1100 MPa at room temperature; and a second alloy portion configured to cover the first alloy portion, the second alloy portion having a thickness in a radial direction smaller than a radius of the first alloy portion, and being made of an aluminum alloy having a tensile strength of 100 MPa to 650 MPa at room temperature.
Abstract:
To prevent reduction in current-carrying capacity due to a reduced diameter of a probe, a probe unit includes the followings: a plurality of large diameter probes; a plurality of small diameter probes having diameters smaller than those of the large diameter probes; a large-diameter probe holder that includes a plurality of large hole portions which individually hold the large diameter probes, and a plurality of reception hole portions which have diameters smaller than those of the large hole portions, communicate with any one of the large hole portions, and receive end portions of the small diameter probes so that the end portions come into contact with the large diameter probes, while a set of the large hole portion and the reception hole portion that communicate with each other pierces through the large-diameter probe holder in a thickness direction; and a small-diameter probe holder that includes a plurality of small hole portions which individually hold the small diameter probes while preventing the small diameter probes from coming off and which pierce through the small-diameter probe holder, and that is stacked on the large-diameter probe holder so that each small hole portion communicates with any one of the reception hole portions. The central axes in a longitudinal direction of the large hole portion and the small hole portion that communicate with each other are separated from each other, and the small hole portions include two small hole portions which are adjacent to each other and of which central axes are separated from each other by a distance shorter than a distance between the central axes of two large hole portions that are corresponding to the two small hole portions.