Sheet-like probe, method of producing the probe, and application of the probe
View Patent ↗A sheet-like probe has a porous film. In the sheet-like probe, a contact film is penetratingly supported at each position of through-holes formed in the porous film, and a peripheral edge of the contact film and the porous film are integrated such that a flexible resin insulation layer is included in a fine hole of the porous film. Electrode structure bodies are supported in a penetrating manner in the insulation layer. Each electrode structure body includes a surface electrode section exposed to the front surface of the insulation layer and projecting from the front surface of the insulation layer, a back surface electrode section exposed to the back surface of the insulation layer, a short-circuit section continuously extending from the base end of the front surface electrode section, penetrating the insulation layer in its thickness direction, and connected to the back surface electrode section, a holding section extending outward, along the front surface of the insulation layer, from the base end section of the front surface electrode section, and a supporting body supporting the insulation layer.
1. A sheet-like probe comprising: a contact film including an insulating layer, and a plurality of electrode structures disposed on the insulating layer apart from each other in a planar direction thereof and extended to penetrate in a direction of a thickness of the insulating layer; and a perforated film,
wherein the contact film is supported to penetrate in each position of a plurality of through holes formed in the perforated film, the perforated film and a peripheral edge portion of the contact film are integrated with each other in such a manner that the insulating layer made of a flexible resin is included in a fine hole of the perforated film,
and wherein each of the electrode structures include: a surface electrode portion exposed from a surface of the insulating layer and projected from the surface of the insulating layer, a back electrode portion exposed from a back face of the insulating layer, a short circuit portion extended to penetrate through the insulating layer in a direction of a thickness thereof continuously from a base end portion of the surface electrode portion and coupled to the back electrode portion, and a holding portion extended outward along the surface of the insulating layer continuously from the base end portion of the surface electrode portion, and
wherein the perforated film is provided with a ring-shaped support plate bonded and fixed to a peripheral edge portion thereof, and the perforated film and the ring-shaped support plate are bonded and fixed by an adhesive impregnated into the perforated film in a contact state thereof with each other.
2. The sheet-like probe according to claim 1 , wherein the perforated film is a mesh or a non woven fabric made of an organic fiber.
3. The sheet-like probe according to claim 1 , wherein the sheet-like probe is used for carrying out an electrical inspection for a plurality of integrated circuits formed on a wafer in a state of the wafer.
4. A probe card for electrically connecting a circuit device to be an inspecting object to a tester, comprising: a circuit board for an inspection which has a plurality of inspection electrodes formed thereon corresponding to an electrode to be inspected in the circuit device to be the inspecting object; an anisotropically conductive connector disposed on the circuit board for an inspection; and
the sheet-like probe according to any of claims 1 or 2 - 3 in which is disposed on the anisotropically conductive connector.
5. The probe card according to claim 4 , wherein the circuit device to be the inspecting object is a wafer having a large number of integrated circuits formed thereon, and
the anisotropically conductive connector includes:
a frame plate having a plurality of openings formed thereon corresponding to an electrode region on which electrodes to be inspected in all or a part of integrated circuits formed on a wafer to be the inspecting object are disposed; and
an anisotropically conductive sheet disposed to close each of the openings of the frame plate.
6. An apparatus for inspecting a circuit device comprising the probe card according to claim 4 .
7. A method of inspecting a wafer comprising the steps of:
electrically connecting each of the integrated circuits of a wafer having a plurality of integrated circuits formed thereon to a tester through the probe card according to claim 4 ; and
electrically inspecting each of the integrated circuits.