JP5154450B2 - Conductive contact unit - Google Patents

Description

  The present invention relates to a conductive contact unit that houses a conductive contact that inputs and outputs signals in an electrical characteristic test of a semiconductor integrated circuit or the like.

  In the electrical characteristic inspection of a semiconductor integrated circuit such as an IC chip, a conductive contact unit that accommodates a plurality of conductive contacts at predetermined positions corresponding to the installation pattern of the external connection electrodes of the semiconductor integrated circuit Is used. The conductive contact unit is formed using a substrate made of a conductive material, and includes a conductive contact holder provided with a hole through which the conductive contact is inserted. In such a conductive contact unit, both ends of the conductive contact are in contact with the spherical electrode of the semiconductor integrated circuit and the electrode of the circuit board for inspection, respectively, thereby establishing electrical connection during inspection. (For example, refer to Patent Document 1).

JP 2002-107377 A

  By the way, when the number of inspections of the electrical characteristic inspection using the conductive contact unit increases, the solder of the spherical electrode of the semiconductor integrated circuit is transferred to the tip of the conductive contact, the contact resistance increases, and normal In some cases, electrical characteristics cannot be inspected. In order to avoid such a situation, in the conventional conductive contact unit, every time a predetermined number of inspections are performed, the work of scraping off the solder attached to the tip of the conductive contact by using a paper file or the like is performed. I went regularly.

  When the above-described shaving operation is repeated, the surface plating such as Au, Pd, Rh, and Ni provided to reduce the contact resistance is scraped off, and the tip of the conductive contact gradually wears. The conductive contact must be replaced. However, with the conventional conductive contact unit, it is not easy to replace the conductive contact. The inspection line must be stopped, the conductive contact holder must be removed from the handler, and further disassembled. Sometimes it wasn't. For this reason, much time and labor are spent on the exchange work of the conductive contact, resulting in an increase in maintenance cost of the conductive contact unit.

  This invention is made | formed in view of the above, Comprising: It aims at providing the electroconductive contactor unit which can perform a maintenance easily and at low cost.

  In order to solve the above-described problems and achieve the object, the conductive contact unit according to the present invention has a first member that can expand and contract in the longitudinal direction and a second member that can contact the first member. And a plurality of conductive contacts for inputting / outputting signals to / from an inspection object in contact with the second member, and the first member included in each of the plurality of conductive contacts. A holding substrate in which a hole capable of accommodating the substrate is formed, and the second member of each of the plurality of conductive contacts is retained and held, and the surface of the holding substrate on the side facing the inspection object And a retaining board that is detachably attached in a state where the longitudinal axis of the corresponding first member and the longitudinal axis of the second member coincide with each other.

  Further, in the conductive contact unit according to the present invention, in the above invention, the retaining substrate is formed by stacking two substrates each having a stepped hole portion through which a part of the second member can be inserted. It is characterized by comprising.

  Further, in the conductive contact unit according to the present invention, in the above invention, the retaining substrate has a protruding piece portion protruding in an inner circumferential direction of an opening portion provided on a surface facing the holding substrate. Features.

  In the conductive contact unit according to the present invention as set forth in the invention described above, the protruding piece is made of a soft resin.

  Further, in the conductive contact unit according to the present invention, in the above invention, the retaining substrate has a thin film-shaped first sheet member that forms a surface facing the holding substrate. The first sheet member is provided.

  In the conductive contact unit according to the present invention as set forth in the invention described above, the protruding piece is made of a soft resin.

  In the conductive contact unit according to the present invention, in the above invention, the first member is connected to a first plunger that contacts a circuit board that generates a signal to be input to the inspection object, and the first plunger. And an elastic member that is extendable in the axial direction of the first plunger, and the second member comprises a second plunger that receives an elastic force from the elastic member when contacting the first member. It is characterized by.

  In the conductive contact unit according to the present invention, in the above invention, the first member houses the first plunger and the elastic member, and the first plunger or the elastic member is disposed at both ends in the longitudinal direction. It includes a cylindrical member that is prevented from coming off.

  In the conductive contact unit according to the present invention, in the above invention, the holding substrate has a surface facing the retaining substrate, and an opening through which a part of the second member can be inserted is provided. It has a thin film-like second sheet member.

  Moreover, the conductive contact unit according to the present invention is characterized in that, in the above invention, the second sheet member has a protruding piece portion protruding in an inner peripheral direction of the opening.

  In the conductive contact unit according to the present invention, in the above invention, the holding substrate includes a first holding substrate having a stepped hole portion through which a tip end portion of the first plunger can be inserted, and the first holding substrate. And a second holding substrate having a stepped hole portion that can be inserted through the base end portion of the second plunger and can prevent the elastic member from coming off. The hole part which 1 holding board | substrate has, and the hole part which said 2nd holding board | substrate has are coaxially connected, It is characterized by the above-mentioned.

  Further, in the conductive contact unit according to the present invention, in the above invention, the second plunger is located on a side closer to the end than the contact portion, the contact portion contacting the elastic member, and the contact portion A fitting portion having a smaller diameter than the portion and capable of being fitted to an end portion of the elastic member.

  Further, in the conductive contact unit according to the present invention, in the above invention, at least a part of an end portion of the elastic member that contacts the second plunger is substantially orthogonal to a longitudinal direction of the elastic member. It is flattened so as to pass through a flat surface.

  Moreover, the conductive contact unit according to the present invention is characterized in that, in the above-mentioned invention, the first member includes a third plunger attached to the elastic member and contacting the second member.

  According to the conductive contact unit according to the present invention, each of the first member that can be expanded and contracted in the axial direction and the second member that can contact the first member, and the inspection object that is in contact with the second member. A plurality of conductive contacts that input and output signals, a holding substrate that is formed of a conductive material and has a hole that can accommodate a first member of each of the plurality of conductive contacts; The second member of each of the conductive contacts is retained and retained, and the longitudinal axis of the corresponding first member and the length of the second member are formed on the surface of the holding substrate on the side facing the object to be inspected. A retaining board that is detachably attached in a state that the direction of the axis coincides with the direction of the axis, so that the retaining board can be used when replacing the second member that is severely deteriorated by repeated contact with the inspection object. After removing from the holding substrate Need only attach the stopper substrate holding with new second member to hold the substrate. Therefore, since the time required for attachment is short and work is easy, maintenance can be performed easily and at low cost.

FIG. 1 is a perspective view showing a configuration of a conductive contact unit according to Embodiment 1 of the present invention. FIG. 2 is a schematic diagram showing a detailed configuration of a main part of the conductive contact unit according to Embodiment 1 of the present invention. FIG. 3 is a diagram showing an outline of the assembly of the second member (second plunger) of the conductive contact to the retaining board in the first embodiment of the present invention. FIG. 4 is a diagram showing an outline of attachment of the retaining substrate to the holding substrate in the first embodiment of the present invention. FIG. 5 is a diagram showing a situation at the time of inspection of the conductive contact unit according to Embodiment 1 of the present invention. FIG. 6 is a diagram showing a configuration of a main part of the conductive contact unit according to Embodiment 2 of the present invention. FIG. 7 is a bottom view showing the configuration of the retaining sheet of the conductive contact unit according to Embodiment 2 of the present invention. FIG. 8 is a diagram showing an outline of attachment of the conductive contact unit to the retaining substrate in the second embodiment of the present invention. FIG. 9 is a diagram illustrating a configuration of a main part of the retaining substrate of the conductive contact unit according to a modification of the second embodiment of the present invention. FIG. 10 is a diagram showing a configuration of a main part of the conductive contact unit according to Embodiment 3 of the present invention. FIG. 11 is a diagram showing an outline of assembly of the second member (second plunger) of the conductive contact to the retaining board in the third embodiment of the present invention. FIG. 12 is a diagram showing an outline of attachment of the retaining substrate to the holding substrate in the third embodiment of the present invention. FIG. 13 is a diagram showing a configuration of a plunger applied to the conductive contact unit according to the first modification of the third embodiment of the present invention. FIG. 14 is a diagram showing a configuration of a plunger applied to the conductive contact unit according to the second modification of the third embodiment of the present invention. FIG. 15 is a diagram showing a configuration of a plunger applied to the conductive contact unit according to the third modification of the third embodiment of the present invention. FIG. 16 is a diagram showing a configuration of a plunger applied to the conductive contact unit according to the fourth modification of the third embodiment of the present invention. FIG. 17 is a diagram illustrating a configuration of a main part of a conductive contact unit according to a fifth modification of the third embodiment of the present invention. FIG. 18 is a diagram illustrating a configuration of a main part of a conductive contact unit according to Embodiment 4 of the present invention. FIG. 19 is a diagram showing an outline of attachment of the retaining substrate to the holding substrate in the fourth embodiment of the present invention. FIG. 20 is a diagram illustrating a configuration of a main part of a conductive contact unit according to a modification of the fourth embodiment of the present invention. FIG. 21 is a diagram showing an outline of attachment of the retaining substrate to the holding substrate in the modification of the fourth embodiment of the present invention. FIG. 22 is a diagram showing a configuration of a main part of a modified example (second modified example) of Embodiment 4 of the present invention. FIG. 23 is a diagram showing a configuration of a main part of a modified example (third modified example) of Embodiment 4 of the present invention. FIG. 24 is a diagram illustrating a configuration of a main part of the conductive contact unit according to Embodiment 5 of the present invention. FIG. 25 is a diagram showing an outline of assembly of the conductive contact unit according to Embodiment 5 of the present invention. FIG. 26 is a top view showing the configuration of the second sheet member applied in the fifth embodiment of the present invention. FIG. 27 is a diagram illustrating a configuration of a main part of a conductive contact unit according to Embodiment 6 of the present invention. FIG. 28 is a diagram showing an outline of assembly of the conductive contact unit according to Embodiment 6 of the present invention. FIG. 29 is a diagram showing a configuration of a main part of a conductive contact unit according to another embodiment of the present invention. FIG. 30 is a diagram showing a configuration of a grounding film on which a pattern for connecting the grounding conductive contacts is printed. FIG. 31 is a diagram showing a configuration of a main part of a conductive contact unit using a grounding film.

Explanation of symbols

1, 11, 12, 13, 14, 15, 16, 17 Conductive contact unit 2 Circuit board 3, 7, 9, 230, 235, 330 Conductive contact 4, 6, 8, 240, 340, 540, 1240 Conductive contact holder 5 Holder member 21 Electrode 31, 71, 91, 231, 331 First plunger 32, 74, 76, 79, 232, 332 Second plunger 72, 75, 77, 78, 92 Third plunger 31a 32a, 71a, 72a, 74a, 75a, 76a, 77a, 78a, 79a, 231a, 232a, 331a, 332a Tip 31b, 32b, 71b, 72b, 74b, 75b, 76b, 77b, 78b, 79b, 231b, 232b, 331b, 332b Flange 31c, 32c, 71c, 72c, 74c, 75c, 76c, 7 7c, 78c, 79c, 231c, 232c, 331c Base end portion 33, 73, 233, 333 Spring member 33a, 73a, 333a Coarse winding portion 33b, 73b, 333b Adhering winding portion 41, 41-2, 81, 241, 341 , 541 Holding substrate 42, 60, 63, 82, 242, 342 Retaining substrate 43, 85, 243, 345 First retaining substrate 44, 86, 244, 346 Second retaining substrate 61, 343 Main substrate 62, 344 Retaining sheet 62a, 63a, 344a Protruding piece 83, 542 First holding substrate 84, 543 Second holding substrate 93 Pipe body 100 Semiconductor integrated circuit 101 Connection electrode 234, 236 Cylindrical member 234a Groove 236a Open end 332c Contact part 332d Fitting part 411,431,441,611,631,851 861, 2141, 2431, 2441, 3411, 3451, 3461 Hole 411a, 431a, 441a, 611a, 631a, 831a, 841a, 851a, 2411a, 2431a, 2441a, 3431a, 3451a, 3461a, 5421a, 5431a Small diameter hole 411b, 431b, 441b, 611b, 631b, 831b, 841b, 851b, 2411b, 2431b, 2441b, 3431b, 3451b, 3461b, 5421b, 5431b Large-diameter hole 411c Maximum-diameter hole 621, 3441 Opening part 831, 5421 First hole part 841, 5431 Second hole 900 Retaining cap 1000 Grounding film

  The best mode for carrying out the present invention (hereinafter referred to as “embodiment”) will be described below with reference to the accompanying drawings. It should be noted that the drawings are schematic, and the relationship between the thickness and width of each part, the ratio of the thickness of each part, and the like may be different from the actual ones. Of course, there may be included portions having different dimensional relationships and ratios.

(Embodiment 1)
FIG. 1 is a perspective view showing a configuration of a conductive contact unit according to Embodiment 1 of the present invention. The conductive contact unit 1 shown in FIG. 1 electrically connects a circuit board 2 having a circuit for generating a signal to be supplied to the semiconductor integrated circuit 100 to be inspected, a circuit in the circuit board 2 and the semiconductor integrated circuit 100. A plurality of conductive contacts 3 to be connected to each other and a conductive contact holder 4 disposed on the circuit board 2 to accommodate and hold the plurality of conductive contacts 3. Further, in the conductive contact unit 1, a holder member 5 for suppressing the displacement of the semiconductor integrated circuit 100 during use is disposed on the circuit board 2 and on the outer periphery of the conductive contact holder 4. Has been.

  The circuit board 2 includes a circuit that inspects the electrical characteristics of the semiconductor integrated circuit 100. The circuit board 2 has a configuration in which an electrode (not shown in FIG. 1) for electrically connecting a built-in circuit to the conductive contact 3 is arranged on a contact surface with the conductive contact holder 4. Have

  FIG. 2 is a schematic diagram showing a detailed configuration of the conductive contact 3 and the conductive contact holder 4. First, the configuration of the conductive contact 3 will be described. The conductive contact 3 protrudes in a direction opposite to the first plunger 31 contacting the electrode 21 provided on the circuit board 2 and the first plunger 31, and has a substantially spherical connection electrode (provided on the semiconductor integrated circuit 100 ( (Bump) 101 is provided between the second plunger 32 in contact with the first plunger 31 and the second plunger 32, and electrically connects the first plunger 31 and the second plunger 32, and has a conductive contact. A spring member (elastic member) 33 that expands and contracts 3 in the longitudinal direction.

  The first plunger 31 has a tip part 31a having a sharp end, a flange part 31b having a diameter larger than the diameter of the tip part 31a, and the surface of the flange part 31b opposite to the surface from which the tip part 31a extends. And a boss-like base end portion 31c having a diameter smaller than the diameter of the flange portion 31b, and has an axisymmetric shape with respect to a central axis parallel to the longitudinal direction.

  The second plunger 32 has a crown-shaped tip portion 32a, a flange portion 32b having a diameter larger than the diameter of the tip portion 32a, and the surface of the flange portion 32b opposite to the surface from which the tip portion 32a extends. And a boss-like base end portion 32c having a diameter smaller than that of the flange portion 32b, and has an axisymmetric shape with respect to a central axis parallel to the longitudinal direction.

  In the spring member 33, the first plunger 31 side is the coarsely wound portion 33a, and the second plunger 32 side is the tightly wound portion 33b. The coarsely wound portion 33a is in sliding contact with the proximal end portion 31c of the first plunger 31, and is brought into contact with the first plunger 31 when the tightly wound portion 33b is buckled. On the other hand, the end portion of the tightly wound portion 33 b is only in pressure contact with the proximal end portion 32 c of the second plunger 32 by the conductive contact holder 4. Therefore, the second plunger 32 is not integral with the first plunger 31 or the spring member 33.

  In the conductive contact 3 having the above-described configuration, the first plunger 31 and the spring member 33 form a first member that can expand and contract in the longitudinal direction. Moreover, the 2nd plunger 32 makes the 2nd member which can contact the one end part (one end part of the spring member 33) of a 1st member. Since the second plunger 32 corresponds to one plunger in the conventional pin-type conductive contact, the length of the conductive contact 3 is the same as that of the conventional structure (the first plunger and the second plunger are interposed via the spring member). The same length as the integrated structure), and excellent high frequency characteristics can be realized.

  Even when the second plunger 32 comes into contact with the spring member 33, there are few portions that enter the spring member 33. For this reason, even when a lateral load is applied to the second plunger 32, the spring lateral load is difficult to be applied to the second plunger 32. Therefore, it is difficult for the second plunger 32 and the spring member 33 to bite, the straightness of the second plunger 32 is improved, and the movement of the second plunger 32 can be improved.

  The conductive contact 3 is roughly divided into three types according to the type of signal supplied to the semiconductor integrated circuit 100. That is, the conductive contact 3 includes a signal conductive contact for inputting and outputting an electrical signal for inspection to the semiconductor integrated circuit 100, and a ground conductive contact for supplying a ground potential to the semiconductor integrated circuit 100. And a power supply conductive contact for supplying electric power to the semiconductor integrated circuit 100. In the first embodiment, since there is no essential difference in the configuration of each type of conductive contact, the various conductive contacts accommodated in the conductive contact holder 4 are collectively referred to as “conductive contact 3”. ing.

  Next, the configuration of the conductive contact holder 4 will be described. The conductive contact holder 4 is opposed to the semiconductor integrated circuit 100 among the holding substrate 41 having a plurality of holes penetrated in the thickness direction in order to insert the conductive contact 3 and the surface of the holding substrate 41. And a retainer substrate 42 that is detachably attached to the surface of the conductive contact 3 and retains the second plunger 32 of the conductive contact 3 while retaining the second plunger 32.

  The holding substrate 41 is formed by being penetrated in the plate thickness direction, and has a hole portion 411 that accommodates and holds the conductive contact 3. The hole 411 has an opening on the side facing the circuit board 2, has a small-diameter hole 411 a into which the distal end portion 31 a of the first plunger 31 can be inserted, and an opening on the surface to which the retaining board 42 is attached. The diameter is larger than the hole 411a, and has a stepped hole shape including the first plunger 31, the spring member 33, and a large diameter hole 411b through which the proximal end portion 32c of the second plunger 32 can be inserted. The small diameter hole 411a and the large diameter hole 411b have a circular cross section. The diameter of the small diameter hole 411 a is smaller than the diameter of the flange portion 31 b of the first plunger 31 of the conductive contact 3, and thus the small diameter hole 411 a functions to prevent the first plunger 31 from coming off.

  The retaining substrate 42 is formed by laminating a first retaining substrate 43 and a second retaining substrate 44. Among these, the first retaining substrate 43 that becomes the surface side of the conductive contact holder 4 when attached to the holding substrate 41 has a hole portion 431 through which the distal end portion 32 a of the second plunger 32 can be inserted. The hole portion 431 includes a small-diameter hole 431a having an opening on the side that becomes the surface of the conductive contact holder 4, and a large-diameter hole 431b that is formed coaxially with the small-diameter hole 431a and has a larger diameter than the small-diameter hole 431a. It has a stepped hole shape. The small diameter hole 431a and the large diameter hole 431b have a circular cross section.

  The second retaining substrate 44 has a hole 441 through which the base end portion 32 c of the second plunger 32 can be inserted. The hole portion 441 has a stepped hole shape including a small-diameter hole 441a having an opening on the surface side of the holding substrate 41, and a large-diameter hole 441b formed coaxially with the small-diameter hole 441a and having a larger diameter than the small-diameter hole 441a. Make. The small diameter hole 441a and the large diameter hole 441b have a circular cross section.

  The diameter of the small diameter hole 431a of the first retaining board 43 and the diameter of the small diameter hole 441a of the second retaining board 44 are smaller than the diameter of the flange portion 32b of the second plunger 32 of the conductive contact 3 (see FIG. 2). In this case, the diameter of the small diameter hole 431a of the first retaining substrate 43 is smaller than the diameter of the small diameter hole 441a of the second retaining substrate 44). Further, the large diameter hole 431b of the first retaining board 43 and the large diameter hole 441b of the second retaining board 44 have the same diameter, and the diameter is the flange of the second plunger 32 of the conductive contact 3. It is larger than the diameter of the part 32b.

  FIG. 3 is a diagram showing an outline of the assembly of the conductive contact 3 to the retaining substrate 42 of the second plunger 32. As shown in the figure, when the first retaining substrate 43 and the second retaining substrate 44 are stacked, the base end portion 32c of the second plunger 32 is reduced from the large diameter hole 441b of the second retaining substrate 44 to a smaller diameter. After the insertion in the direction of the hole 441a, the tip 32a of the second plunger 32 is inserted into the hole 431 of the first retaining substrate 43, and the first retaining substrate 43 and the second retaining substrate 44 are attached with screws or the like. . By forming the retainer substrate 42 in this manner, the second plunger 32 is held in a state of being retained by the retainer substrate 42.

  FIG. 4 is a diagram illustrating a state in which the retaining substrate 42 with the second plunger 32 assembled thereto is attached to the holding substrate 41. As shown in the figure, the retaining substrate 42 is lowered toward the holding substrate 41 with the base end portion 32c as the bottom surface side. Thereafter, the base end portion 32c comes into contact with the spring member 33 and starts to receive elastic force from the spring member 33. When the base end portion 32c enters a state as shown in FIG. 2, it is attached to the holding substrate 41 with screws or the like. In order to perform this attachment with high accuracy, a positioning opening is formed in the holding substrate 41 and the retaining substrate 42, and at the time of attachment, a predetermined opening in the retaining substrate 41 and the retaining substrate 42 is formed between the openings. You may make it position by inserting a positioning pin.

  FIG. 5 is a diagram schematically showing a state in which the conductive contact unit 1 is inspecting the semiconductor integrated circuit 100. When the inspection shown in FIG. 5 is repeatedly performed, the solder of the connection electrode 101 adheres to the tip of the tip end portion 32a, and the contact resistance value may increase, thereby hindering the electrical characteristic inspection. In such a case, in the first embodiment, it is only necessary to remove the retaining substrate 42 from the holding substrate 41 and replace it, so that the replacement operation is simple.

  The conductive contact holder 4 is formed using an insulating material such as resin, machinable ceramic, or silicon.

  The holes 411, 431, and 441 formed in the holding substrate 41, the first retaining substrate 43, and the second retaining substrate 44 are drilled, etched, stamped, or laser, electron beam, It is formed by performing processing using an ion beam, wire discharge, or the like.

  The conductive contact unit 1 is obtained by assembling necessary members such as the circuit board 2 and the holder member 5 to the conductive contact holder 4 manufactured as described above. The conductive contact unit 1 can be easily assembled and disassembled. Therefore, maintenance including repair, replacement, etc. of the conductive contact 3 can be easily performed.

  According to the conductive contact unit according to Embodiment 1 of the present invention described above, the first member that can be expanded and contracted in the axial direction, and the second member that can contact the first member, respectively, A plurality of conductive contacts for inputting / outputting signals to / from an inspection object in contact with a member, and a hole formed by a conductive material and capable of accommodating a first member of each of the plurality of conductive contacts. The formed holding substrate and the second member of each of the plurality of conductive contacts are retained and held, and the longitudinal direction of the corresponding first member is placed on the surface of the holding substrate facing the object to be inspected. And a retaining plate that is detachably attached in a state where the axis of the second member coincides with the longitudinal axis of the second member, and the second member is subject to severe deterioration over time due to repeated contact with the inspection object. When replacing the After removal from the lifting substrate need only attach the stopper substrate to hold the new second member to hold the substrate. Therefore, since the time required for attachment is short and work is easy, maintenance can be performed easily and at low cost.

  Further, according to the first embodiment, only the leading end side (second member) of the conductive contact, which is the largest factor that increases the contact resistance value, is exchanged, so that there is no problem with the other first members. It can be used continuously and is economical.

  Furthermore, according to this Embodiment 1, only the one end part of an electroconductive contactor is exchangeable, the 1st plunger and spring member by the side of wiring are shared, and it is the 2nd member which is a 2nd member according to a test object. The diameter of the plunger and the shape of the tip can be changed as appropriate. As a result, there is no need to change the conductive contact and conductive contact holder according to conditions such as the material, shape and size of the connection electrode to be inspected as in the past, saving resources and reducing costs. Can be realized. Of course, the application range of the diameter of the second plunger is set in consideration of the pitch between the conductive contacts.

  Further, according to the first embodiment, since it is not necessary to increase the length of the conductive contact, it is possible to realize excellent high frequency characteristics.

(Embodiment 2)
FIG. 6 is a diagram showing a configuration of a main part of a conductive contact holder forming a part of the conductive contact unit according to Embodiment 2 of the present invention. The conductive contact holder 6 shown in the figure includes a holding substrate 41 having a plurality of holes penetrated in the thickness direction in order to insert and hold the conductive contact 3, and the surface of the holding substrate 41. And a retaining substrate 60 that is detachably attached to the surface on the side facing the semiconductor integrated circuit 100 and retains the second plunger 32 (second member) of the conductive contact 3 while retaining it. The retaining substrate 60 is attached to the main substrate 61 and the surface of the main substrate 61 facing the holding substrate 41, and is a thin film retaining member that prevents the second plunger 32 from being released toward the holding substrate 41. And a sheet 62 (first sheet member). The holding substrate 41 is the same as that applied to the conductive contact holder 4 according to the first embodiment.

  The main board 61 has a hole 611 through which the tip 32 a of the second plunger 32 can be inserted. The hole 611 includes a small-diameter hole 611a having an opening on the surface side of the conductive contact holder 6, and a large-diameter hole 611b formed coaxially with the small-diameter hole 611a and having a diameter larger than that of the small-diameter hole 611a. It has a hole shape. Both the small diameter hole 611a and the large diameter hole 611b have a circular cross section. In addition, the hole process at the time of forming the hole part 611 is the same as the hole process in the said Embodiment 1. FIG.

  As shown in the bottom view of FIG. 7, the retaining sheet 62 has a circular opening 621, and a part of the opening 621 protrudes in the inner peripheral direction of the opening 621. Is forming. The inner diameter of the protruding piece portion 62a is smaller than the diameter of the flange portion 32b of the second plunger 32. Thereby, the protruding piece 62a has a function of preventing the second plunger 32 from coming off. FIG. 6 is a partial cross-sectional view corresponding to a cross section taken along line AA of FIG.

  The retaining sheet 62 is adhered to the main substrate 61 by an adhesive means such as an adhesive or a double-sided tape. Note that the retainer sheet 62 may be formed of a thermosetting resin, and attached to the main board 61 by heating the thermosetting resin.

  When the second plunger 32 is attached to the main substrate 61 to which the retaining sheet 62 is attached, the distal end of the distal end portion 32 a is inserted from the opening of the retaining sheet 62 toward the retaining sheet 62. At the time of this insertion, since the diameter of the flange portion 32b is larger than the diameter of the protruding piece portion 62a, the flange portion 32b is caught by the protruding piece portion 62a, but the retaining sheet 62 is thin and bends, so that the second plunger By further pushing 32 toward the main board 61, the flange 32b enters the hole 611 of the main board 61 while bending the protruding piece 62a. In this way, the second plunger 32 that has once entered and held the hole 611 is prevented from coming off by the protruding piece 62a unless a large force is applied. The retaining sheet 62 can be realized by a flexible material, for example, a soft resin plate or film. The thickness of the retaining sheet 62 is more preferably 30 to 100 μm.

  As shown in FIG. 8, the retainer substrate 60 holding the second plunger 32 as described above is lowered toward the holding substrate 41 with the base end portion 32c of the second plunger 32 as the bottom surface side, and finally the figure is shown. 6 is attached to the holding substrate 41 with screws or the like.

  Since the retaining substrate 60 supports the outer periphery of the flange portion 32b of the second plunger 32 and the outer periphery of the base end portion 32c while sliding, the rectilinearity of the second plunger 32 can be improved.

  Each configuration of the conductive contact unit other than the above is the same as the configuration of the conductive contact unit 1 according to the first embodiment.

  According to the second embodiment of the present invention described above, the retaining substrate protrudes in the inner peripheral direction of the opening provided on the surface facing the holding substrate, and the second member can be inserted. Since it has the thin film-like projecting piece for preventing the second member from coming off, the second member can be easily attached to and detached from the retaining board. In particular, if the projecting piece is made of a soft resin, it becomes easier to attach and detach.

  FIG. 9 is a diagram illustrating a configuration of a main part of a retaining board of a conductive contact unit according to a modification of the second embodiment. The retaining substrate 63 shown in the figure has a thin film-like protruding piece 63a protruding in the radial center direction at the opening end of the large-diameter hole 631b of the hole 631 composed of the small-diameter hole 631a and the large-diameter hole 631b. Has been. The shape of the protruding piece 63a is the same as the protruding piece 62a of the retaining sheet 62 described above. Note that the retaining substrate 63 may be formed of a soft resin.

(Embodiment 3)
FIG. 10 is a diagram showing a configuration of a main part of the conductive contact unit according to Embodiment 3 of the present invention. The conductive contact unit 11 shown in FIG. 1 electrically connects a circuit board 2 having a circuit for generating a signal to be supplied to the semiconductor integrated circuit 100 to be inspected, a circuit in the circuit board 2 and the semiconductor integrated circuit 100. A plurality of conductive contacts 7 to be connected to each other, and a conductive contact holder 8 disposed on the circuit board 2 for receiving and holding the plurality of conductive contacts 7. In addition, the conductive contact unit 11 has a holder member 5 for suppressing the displacement of the semiconductor integrated circuit 100 during use, like the conductive contact unit 1 according to the first embodiment. These are arranged on the circuit board 2 and on the outer periphery of the conductive contact holder 8 (see FIG. 1).

  The conductive contact 7 includes a second plunger 74 that contacts the connection electrode 101 of the semiconductor integrated circuit 100 in addition to the configuration of the conventional pin-type conductive contact. That is, the conductive contact 7 includes a first plunger 71 that contacts the electrode 21 provided on the circuit board 2, a third plunger 72 that protrudes in a direction opposite to the first plunger 71, and the first plunger 71 and the third plunger. 72, a spring member (elastic member) 73 that electrically connects the first plunger 71 and the third plunger 72 and expands and contracts the conductive contact 7 in the longitudinal direction, and a third plunger 72 A second plunger 74 that is in pressure contact with the tip of the first plunger and is arranged coaxially with the third plunger 72.

  The first plunger 71 has a tip portion 71a having a sharp end, a flange portion 71b having a diameter larger than the diameter of the tip portion 71a, and the surface of the flange portion 71b opposite to the surface from which the tip portion 71a extends. And a boss-like base end portion 71c having a diameter smaller than the diameter of the flange portion 71b, and has an axisymmetric shape with respect to a central axis parallel to the longitudinal direction.

  The third plunger 72 has a crown-shaped tip 72a, a flange 72b having a diameter larger than the diameter of the tip 72a, and the surface of the flange 72b opposite to the surface from which the tip 72a extends. And a boss-like base end portion 72c having a smaller diameter than the flange portion 72b, and has an axisymmetric shape with respect to a central axis parallel to the longitudinal direction.

  As for the spring member 73, the 1st plunger 71 side is the rough winding part 73a, while the 3rd plunger 72 side is the contact | adherence winding part 73b. The end of the rough winding portion 73 a is press-fitted into the base end portion 71 c of the first plunger 71, while the end portion of the tightly wound portion 73 b is press-fitted into the base end portion 72 c of the third plunger 72. As a result, the spring member 73 connects the first plunger 71 and the third plunger 72.

  Similarly to the third plunger 72, the second plunger 74 has a crown-shaped tip portion 74a, a flange portion 74b having a diameter larger than the diameter of the tip portion 74a, and a boss shape having a diameter smaller than the flange portion 74b. And a base end portion 74c, and has an axisymmetric shape with respect to a central axis parallel to the longitudinal direction. The second plunger 74 is held by the conductive contact holder 8, and the end surface of the base end portion 74 c is only in pressure contact with the distal end portion 72 a of the third plunger 72. Therefore, the second plunger 74 is not integral with other parts of the conductive contact 7.

  In the conductive contact 7 having the above configuration, the first plunger 71, the third plunger 72, and the spring member 73 having the same configuration as the conventional conductive contact are formed of the first member that can expand and contract in the longitudinal direction. Eggplant. Moreover, the 2nd plunger 74 makes the 2nd member which can contact the one end part (one end part of the front-end | tip part 72a of the 3rd plunger 72) of a 1st member.

  Next, the configuration of the conductive contact holder 8 will be described. The conductive contact holder 8 includes a holding substrate 81 having a plurality of holes penetrating in the thickness direction in order to insert and hold portions other than the second plunger 74 of the conductive contact 7, and the holding substrate 81. And a retaining substrate 82 that is detachably attached to the surface on the side facing the semiconductor integrated circuit 100 and that holds the second plunger 74 while preventing the second plunger 74 from coming off to the outside. .

  The holding substrate 81 includes a first holding substrate 83 and a second holding substrate 84 formed of a conductive material. The two substrates are stacked in the plate thickness direction and attached using screws or the like (not shown). . Note that the thickness of the first holding substrate 83 and the thickness of the second holding substrate 84 are generally different.

  The first holding substrate 83 is formed with a first hole portion 831 that penetrates in the thickness direction and accommodates and holds a part of the conductive contact 7. The first hole 831 has an opening on the surface of the first holding substrate 83 on the side that does not contact the second holding substrate 84, and has a small-diameter hole 831 a through which the tip 71 a of the first plunger 71 can be inserted. And a large-diameter hole 831b having a diameter larger than that of the small-diameter hole 831a. The small diameter hole 831a and the large diameter hole 831b have a circular cross section.

  The second holding substrate 84 is formed with a second hole portion 841 that penetrates in the thickness direction and accommodates and holds a part of the conductive contact 7. The second hole portion 841 has an opening on the surface of the second holding substrate 84 that is not in contact with the first holding substrate 83, and has a small diameter hole 841a through which the tip portion 72a of the third plunger 72 can be inserted. And a large-diameter hole 841b having a diameter larger than that of the small-diameter hole 841a. The small diameter hole 841a and the large diameter hole 841b have a circular cross section.

  In a state where the first holding substrate 83 and the second holding substrate 84 are stacked, the first hole portion 831 and the second hole portion 841 are arranged coaxially.

  The retaining board 82 is formed by laminating a first retaining board 85 and a second retaining board 86. Among these, the first retaining substrate 85 which becomes the surface side of the conductive contact holder 8 when attached to the holding substrate 81 has a hole 851 into which the tip 74 a of the second plunger 74 can be inserted. The hole portion 851 includes a small-diameter hole 851a having an opening on the surface side of the conductive contact holder 8, and a large-diameter hole 851b formed coaxially with the small-diameter hole 851a and having a diameter larger than that of the small-diameter hole 851a. It has a stepped hole shape. The small diameter hole 851a and the large diameter hole 851b have a circular cross section. The diameter of the small diameter hole 851a is smaller than the diameter of the flange portion 74b of the second plunger 74, and the diameter of the large diameter hole 851b is larger than the diameter of the flange portion 74b of the second plunger 74.

  The second retaining substrate 86 has a circular cross section and has a hole portion 861 into which the distal end portion 72a of the third plunger 72 and the proximal end portion 74c of the second plunger 74 can be inserted. The diameter of the hole 861 is smaller than the diameter of the flange portion 74 b and larger than the diameter of the distal end portion 72 a of the third plunger 72 and the diameter of the proximal end portion 74 c of the second plunger 74.

  Various hole portions respectively formed in the holding substrate 81 and the retaining substrate 82 are formed by performing the same hole processing as described in the first embodiment.

  FIG. 11 is a diagram showing an outline of the assembly of the conductive contact 7 to the retaining substrate 82 of the second plunger 74. As shown in the figure, when the first retaining board 85 and the second retaining board 86 are stacked, the base end portion 74c of the second plunger 74 is inserted into the hole 861 of the second retaining board 86. Thereafter, the tip 74a of the second plunger 74 is inserted into the hole 851 of the first retaining board 85, and the first retaining board 85 and the second retaining board 86 are attached with screws or the like. By forming the retainer substrate 82 in this manner, the second plunger 74 is held in a state of being retained by the retainer substrate 82.

  FIG. 12 is a diagram illustrating a state in which the retaining substrate 82 with the second plunger 74 assembled thereto is attached to the holding substrate 81. As shown in the figure, the retaining substrate 82 is lowered toward the first holding substrate 81 with the second retaining substrate 86 as the bottom surface side. Thereafter, the distal end portion 72a of the third plunger 72 is inserted into the hole 861 of the second retaining plate 86, and the retaining substrate 82 is further lowered to a predetermined position, and then the holding substrate 81 and the retaining substrate 82 are moved. By attaching with a screw or the like, the conductive contact holder 8 is completed. It is to be noted that a positioning opening is formed in the holding substrate 81 and the retaining substrate 82, and a positioning pin is inserted between predetermined openings of the retaining substrate 81 and the retaining substrate 82 at the time of attachment. You may make it position.

  Incidentally, since the holding substrate 81 also has a function of supplying a ground potential, it is preferable that the electrical contact resistance between the first holding substrate 83 and the second holding substrate 84 be as low as possible. For this reason, it is preferable that the contact surface where the first holding substrate 83 and the second holding substrate 84 are in contact with each other is processed smoothly, or surface treatment such as nickel plating + gold plating is performed on the contact surface.

  In Embodiment 3 of this invention demonstrated above, since it is set as the structure which uses the conventional electroconductive contactor as a 1st member and makes the 2nd plunger which is a 2nd member contact with this electroconductive contactor. Thus, it is possible to realize a conductive contact unit capable of easily exchanging the front end portion of the conductive contact that is greatly deteriorated with time at low cost.

(Modification of Embodiment 3)
Embodiment 3 of the present invention has various modifications regarding the shapes of the second plunger and the third plunger. FIG. 13 applies the same second plunger 74 as in FIG. 10 as the second member, while the third plunger 75 on the side of the first member that contacts the second plunger 74 has a tip end portion 75a having a boss shape, and a flange portion. The case where it has 75b and the base end part 75c which makes | forms a boss | hub shape is illustrated (1st modification). In this case, since the bottom surface of the base end portion 74c and the front end surface of the front end portion 75a are flat surfaces facing each other, the contact area between the second plunger 74 and the third plunger 75 is increased, and reliable conduction at the time of inspection is achieved. Can be realized.

  14, the third plunger is the same third plunger 72 as in FIG. 10, while the second plunger 76 on the second member side has a crown-shaped tip 76 a, flange 76 b, and third plunger 72. The case where it has the base end part 76c which has the sharp end suitable for the front-end | tip part 72a is shown in figure (2nd modification). In this case, since the sharp end of the base end portion 76c comes into contact with the crown shape of the tip end portion 72a of the third plunger 72, the contact area between the third plunger 72 and the second plunger 76 is increased, which is ensured at the time of inspection. Conductivity can be obtained.

  In FIG. 15, the second plunger 76, which is the same as that in FIG. 14, is used as the second member, and the third plunger 77 on the first member side that contacts the second plunger 76 has a boss shape and has a dent at the end. The case where it has the part 77a, the flange part 77b, and the base end part 77c which makes | forms a boss | hub shape is illustrated (3rd modification). In the third modified example, as in the two modified examples, the contact area between the second plunger 76 and the third plunger 77 is increased, and reliable conduction at the time of inspection can be obtained.

  FIG. 16 illustrates a modification in which the relationship between the unevenness and the case illustrated in FIG. 15 is reversed (fourth modification). In the fourth modified example, the third plunger 78 on the first member side includes a distal end portion 78a having a sharp end, a flange portion 78b, and a proximal end portion 78c. On the other hand, the second plunger 79, which is the second member, has a crown-shaped distal end 79a, a flange 79b, and a boss-shaped base end 79c that is recessed at the end. Also in this case, the same effect as the above-described three modifications can be obtained.

  As described above, in the present third embodiment, the shape of the second plunger as the second member is adjusted in accordance with the tip shape of the plunger (third plunger) of various types of conductive contacts conventionally used. Therefore, resource saving and cost reduction can be realized.

  FIG. 17 is a diagram illustrating a configuration of a main part of a conductive contact unit according to a fifth modification of the third embodiment. In the conductive contact unit 12 shown in the figure, a barrel type conductive contact including a spring member or the like is used as the first member instead of the conductive contact 7 of FIG. That is, the conductive contact 9 includes a first plunger 91 and a third plunger 92 having the same shape as the first plunger 71 and the third plunger 72 of the conductive contact 7, respectively, and the first plunger 91 and the third plunger. A pipe body 93 formed in a cylindrical shape so as to cover a part of the base end side of 92 and a spring member (not shown), and a second plunger 74 (second member) that is prevented from being detached by a retaining substrate 82. And comprising. In this sense, the first plunger 91, the third plunger 92, and the pipe body 93 form a first member that can expand and contract in the longitudinal direction.

  The configuration of the conductive contact unit 12 other than the above is the same as the configuration of the conductive contact unit 11 according to the third embodiment, and corresponding portions are denoted by the same reference numerals.

  The conductive contact unit 12 according to the fifth modification is the same as the conductive contact unit 11 in that a conventional conductive contact can be applied. Therefore, similarly to the above-described third embodiment, a conductive contact unit that can easily replace the tip of the conductive contact that is greatly deteriorated with time can be realized at low cost.

(Embodiment 4)
FIG. 18 is a diagram illustrating a configuration of a main part of a conductive contact unit according to Embodiment 4 of the present invention. The conductive contact unit 13 shown in the figure includes a circuit board 2, a conductive contact 230, and a conductive contact holder 240. The external configuration of the conductive contact unit 13 is the same as that shown in FIG.

  The conductive contact 230 protrudes in a direction opposite to the first plunger 231 that contacts the electrode 21 provided on the circuit board 2 and the first plunger 231, and the second plunger that contacts the connection electrode 101 of the semiconductor integrated circuit 100. 232, a spring member (between the first plunger 231 and the second plunger 232, which electrically connects the first plunger 231 and the second plunger 232, and expands and contracts the conductive contact 230 in the longitudinal direction ( Elastic member) 233, a part of the first plunger 231 and the spring member 233, and both ends of the first member accommodate the first plunger and the elastic member, and the first plunger 231 at both ends in the longitudinal direction. Or the cylindrical member 234 formed by retaining the spring member 233 is provided.

  The first plunger 231 has a distal end portion 231a, a flange portion 231b, and a proximal end portion 231c, similarly to the first plunger 31 described in the first embodiment. Similarly to the second plunger 32 described in the first embodiment, the second plunger 232 has a distal end portion 232a, a flange portion 232b, and a proximal end portion 232c. The second plunger 232 is not integral with the first plunger 231, the spring member 233, and the cylindrical member 234.

  The spring member 233 is wound at a uniform pitch.

  The cylindrical member 234 has a groove portion 234a that is recessed in the inner diameter direction over the entire circumference in the vicinity of the opening end portion with which the end portion of the spring member 233 contacts. The groove 234a is formed by crushing the end of the cylindrical member 234 after inserting the spring member 233, and the spring member 233 (and the first plunger 231) is prevented from coming off from the cylindrical member 234. Have The other end portion of the cylindrical member 234 has an opening having a diameter smaller than the diameter of the flange portion 231b of the first plunger 231, and prevents the first plunger 231 from coming off.

  The cylindrical member 234 is press-fitted into the large-diameter hole 2411b of the hole 2411. This prevents the tubular member 234 from coming out of the hole 2411. There may be a slight gap between the cylindrical member 234 and the large-diameter hole 2411b.

  Even if the second plunger 232 comes into contact with the spring member 233, there are few portions that enter the inside of the spring member 233. For this reason, even when a lateral load is applied to the second plunger 232, the spring lateral load is difficult to be applied to the second plunger 232. Therefore, it is difficult for the second plunger 232 and the spring member 233 to bite, the straightness of the second plunger 232 is improved, and the movement of the second plunger 232 can be improved.

  In the conductive contact 230 having the above-described configuration, the first plunger 231, the spring member 233, and the tubular member 234 form a first member that can expand and contract in the longitudinal direction. Moreover, the 2nd plunger 232 makes the 2nd member which can contact the one end part (one end part of the spring member 233) of a 1st member.

  Next, the configuration of the conductive contact holder 240 will be described. The conductive contact holder 240 is opposed to the semiconductor integrated circuit 100 among the holding substrate 241 having a plurality of holes penetrated in the plate thickness direction so as to pass through the conductive contact 230 and the surface of the holding substrate 241. And a retaining substrate 242 that is detachably attached to the surface of the conductive contact 230 and retains the second plunger 232 of the conductive contactor 230 while retaining it.

  The holding substrate 241 is formed by being penetrated in the plate thickness direction, and has a hole 2411 for receiving and holding the conductive contact 230. The hole 2411 has an opening on the side facing the circuit board 2, and has a small diameter hole 2411 a into which the tip portion 231 a of the first plunger 231 can be inserted, and an opening on the surface to which the retaining board 242 is attached. It has a stepped hole shape having a larger diameter than the hole 2411a and a large diameter hole 2411b through which the first plunger 231 and the tubular member 234 can be inserted. The small diameter hole 2411a and the large diameter hole 2411b have a circular cross section. The diameter of the small diameter hole 2411a is smaller than the diameter of the cylindrical member 234. For this reason, the small diameter hole 2411a functions to prevent the cylindrical member 234 from coming off.

  The retaining substrate 242 is formed by laminating a first retaining substrate 243 and a second retaining substrate 244. Among these, the first retaining substrate 243 on the surface side of the conductive contact holder 240 when attached to the holding substrate 241 has a hole portion 2431 through which the distal end portion 232a of the second plunger 232 can be inserted. The hole portion 2431 includes a small diameter hole 2431a having an opening on the surface side of the conductive contact holder 240, and a large diameter hole 2431b formed coaxially with the small diameter hole 2431a and having a diameter larger than that of the small diameter hole 2431a. It has a stepped hole shape. The small diameter hole 2431a and the large diameter hole 2431b have a circular cross section.

  The second retaining substrate 244 has a hole 2441 through which the base end 232 c of the second plunger 232 can be inserted. The hole portion 2441 is a stepped hole shape including a small-diameter hole 2441a having an opening on the surface side of the holding substrate 241, and a large-diameter hole 2441b that is formed coaxially with the small-diameter hole 2441a and has a larger diameter than the small-diameter hole 2441a. Make. The small diameter hole 2441a and the large diameter hole 2441b have a circular cross section.

  The large diameter hole 2431b of the first retaining substrate 243 and the large diameter hole 2441b of the second retaining substrate 244 have the same diameter, and the diameter is larger than the diameter of the flange portion 232b of the second plunger 232.

  The assembly of the second plunger 232 to the retaining substrate 242 is the same as the assembly of the second plunger 32 to the retaining substrate 42 in the first embodiment (see FIG. 3).

  Since the retaining substrate 242 supports the outer periphery of the flange portion 232b of the second plunger 232 and the outer periphery of the base end portion 232c while sliding, the rectilinearity of the second plunger 232 can be improved.

  FIG. 19 is a diagram illustrating a situation in which the retaining substrate 242 with the second plunger 232 assembled thereto is attached to the holding substrate 241. As shown in the drawing, the retaining substrate 242 is lowered toward the holding substrate 241 with the base end portion 232c as the bottom surface side, and the base end portion 232c abuts against the spring member 233 and elastic force from the spring member 233 is obtained. Then, when the state shown in FIG. 18 is reached, it is attached to the holding substrate 241 with screws or the like. In the state shown in FIG. 19, the end of the end of the spring member 233 that is not attached to the first plunger 231 is prevented from being detached by the groove 234 a of the cylindrical member 234.

  According to the fourth embodiment of the present invention described above, even when the conductive contact member housed in the cylindrical member is used as the elastic member, for example, the third plunger is more than the conductive contact member shown in FIG. Since it can be shortened, the plate thickness of the conductive contact holder can be reduced. As a result, the holder hole processing time of the conductive contact holder can be shortened, and the deterioration of the high frequency electrical characteristics can be prevented.

  Further, according to the fourth embodiment, the holding substrate can be processed by a single sheet, and it is sufficient to process only one end, so that manufacturing is also easy.

  In addition, according to the fourth embodiment, since the spring member can be fixed with an initial load by retaining with the tubular member, the stroke of the second plunger is reduced, and the retaining substrate It is possible to reduce the plate thickness. As a result, the thickness of the entire conductive contact unit can be made the same as that of the conventional structure, and there is no need to change the setting of the pushing device called the handler pusher, which is convenient for semiconductor manufacturers using the conductive contact unit. is there.

  FIG. 20 is a diagram illustrating a configuration of a conductive contact unit according to a first modification of the fourth embodiment. FIG. 21 is a diagram showing a state before the retaining substrate is attached to the holding substrate in the conductive unit according to this modification. In the conductive contact unit 14 shown in these drawings, the configuration of the cylindrical member 236 forming a part of the first member of the conductive contact is different from the configuration of the cylindrical member 234 described in the fourth embodiment. . Specifically, the cylindrical member 236 forming a part of the conductive contact 235 has an open end 236a that is reduced in diameter in the inner diameter direction. The open end 236a is formed by drawing or the like, and fulfills the function of preventing the spring member 233 from coming off.

  The cylindrical member 236 is press-fitted into the large-diameter hole 2411b of the hole 2411 in the same manner as the cylindrical member 234. Thereby, the cylindrical member 236 is prevented from coming out of the hole 2411. There may be a slight gap between the cylindrical member 236 and the large diameter hole 2411b.

  The structure of the conductive contact unit 14 excluding the cylindrical member 236 of the conductive contact 235 is the same as the structure of the conductive contact unit 13.

  By the way, although the pitch of the spring members 233 is assumed to be uniform in the fourth embodiment, the spring member 33 (having the coarsely wound portion 33a and the tightly wound portion 33b) applied in the first embodiment is cylindrical. You may accommodate in the member 234 or 236 (refer FIG. 22 and FIG. 23).

  In the case shown in FIGS. 22 and 23, even if the second plunger 232 comes into contact with the spring member 33, there are few portions that enter the spring member 33. For this reason, even when a lateral load is applied to the second plunger 232, the spring lateral load is difficult to be applied to the second plunger 232. Therefore, it is difficult for the second plunger 232 and the spring member 33 to bite, the straightness of the second plunger 232 is improved, and the movement of the second plunger 232 can be improved.

  According to the modification of the fourth embodiment described above, the same effect as in the fourth embodiment can be obtained.

(Embodiment 5)
FIG. 24 is a diagram illustrating a configuration of a main part of the conductive contact unit according to Embodiment 5 of the present invention. FIG. 25 is a diagram showing an outline of assembly of the conductive contact unit according to the fifth embodiment. The conductive contact unit 15 shown in these drawings includes a circuit board 2, a conductive contact 330, and a conductive contact holder 340. The external configuration of the conductive contact unit 15 is the same as that shown in FIG.

  The conductive contact 330 protrudes in a direction opposite to the first plunger 331 contacting the electrode 21 provided on the circuit board 2 and the first plunger 331, and the second plunger contacting the connection electrode 101 of the semiconductor integrated circuit 100. 332 and a spring member that is provided between the first plunger 331 and the second plunger 332, electrically connects the first plunger 331 and the second plunger 332, and expands and contracts the conductive contact 330 in the longitudinal direction. (Elastic member) 333 is provided.

  Similar to the first plunger 31 described in the first embodiment, the first plunger 331 has a distal end portion 331a, a flange portion 331b, and a proximal end portion 331c.

  The second plunger 332 includes a tip portion 332a, a flange portion 332b, a contact portion 332c that contacts the end of the spring member 333, and a fitting portion 332d that has a smaller diameter than the contact portion 332c and is fitted to the spring member 333. Have. The second plunger 332 is not integral with the first plunger 331 and the spring member 333.

  In the spring member 333, the first plunger 331 side is the rough winding portion 333a, while the second plunger 332 side is the tight winding portion 333b. The end of the rough winding portion 333a is attached to the base end portion 331c of the first plunger 331. The end portion of the tightly wound portion 333b contacts the contact portion 332c of the second plunger 332, and the fitting portion 332d of the second plunger 332 is fitted to the inner peripheral portion near the end portion. The end portion of the tightly wound portion 333b is flattened so that a part thereof passes through a plane substantially orthogonal to the longitudinal direction of the spring member 333. This flattening is realized by polishing the end of the spring member 333. By performing such flattening, conduction between the spring member 333 and the second plunger 332 can be ensured.

  In the conductive contact 330 having the above configuration, the first plunger 331 and the spring member 333 form a first member that can expand and contract in the longitudinal direction. Moreover, the 2nd plunger 332 makes the 2nd member which can contact the one end part (one end part of the spring member 333) of a 1st member.

  Next, the configuration of the conductive contact holder 340 will be described. The conductive contact holder 340 is opposed to the semiconductor integrated circuit 100 among the holding substrate 341 having a plurality of holes penetrated in the thickness direction in order to insert the conductive contact 330 and the surface of the holding substrate 341. And a retaining substrate 342 that is detachably attached to the surface on the side to be held and retains the second plunger 332 of the conductive contactor 330 while retaining it.

  The holding substrate 341 includes a main substrate 343 that houses and holds the conductive contact 330, and a surface that faces the retaining substrate 342 out of the surface of the main substrate 343, and is a thin film-shaped retaining member that prevents the spring member 333 from coming off. And a stop sheet 344 (second sheet member).

  The main substrate 343 is formed by penetrating in the plate thickness direction, and has a hole 3431 that accommodates and holds the conductive contact 330. The hole 3431 has an opening on the side facing the circuit board 2, has a small diameter hole 3431 a into which the tip 331 a of the first plunger 331 can be inserted, and an opening on the surface to which the retaining board 342 is attached, and has a small diameter. It has a stepped hole shape having a larger diameter than the hole 3431a and a large diameter hole 3431b through which the first plunger 331 and the spring member 333 can be inserted. The small diameter hole 3431a and the large diameter hole 3431b have a circular cross section. The diameter of the small diameter hole 3431a is smaller than the diameter of the flange portion 331b of the first plunger 331. For this reason, the small diameter hole 3431a functions to prevent the first plunger 331 from coming off.

  As shown in the top view of FIG. 26, the retaining sheet 344 has a substantially circular opening 3441, and a protruding piece portion in which a part of the opening 3441 protrudes in the inner peripheral direction of the opening 3441. 344a is formed. The protruding piece 344 a has an inner diameter that is larger than the diameter of the contact portion 332 c of the second plunger 332 and smaller than the outer diameter of the spring member 333. Therefore, the projecting piece 344a functions to prevent the spring member 333 from coming off, and can be inserted through the contact portion 332c and the fitting portion 332d of the second plunger 332. 24 and 25 are partial cross-sectional views corresponding to the cross section taken along line BB in FIG.

  After the first plunger 331 and the spring member 333 are inserted into the hole 3431 of the main substrate 343, the retaining sheet 344 is bonded to the surface of the main substrate 343 opposite to the retaining substrate 342 with an adhesive or a double-sided tape. Bonding is performed by using a bonding means such as

  Instead of using the bonding means, the retainer sheet 344 may be formed of a thermosetting resin and attached to the main substrate 343 by heating the thermosetting resin. Alternatively, the first plunger 331 and the spring member 333 may be inserted into the hole 3431 after the retaining sheet 344 is attached first.

  The retaining sheet 344 can be realized by a flexible material, for example, a soft resin plate or film.

  The retaining substrate 342 is formed by stacking a first retaining substrate 345 and a second retaining substrate 346. Among these, the first retaining substrate 345 that becomes the surface side of the conductive contact holder 340 when attached to the holding substrate 341 has a hole portion 3451 through which the tip portion 332 a of the second plunger 332 can be inserted. The hole portion 3451 includes a small-diameter hole 3451a having an opening on the side that becomes the surface of the conductive contact holder 340, and a large-diameter hole 3451b that is formed coaxially with the small-diameter hole 3451a and has a larger diameter than the small-diameter hole 3451a. It has a stepped hole shape. The small diameter hole 3451a and the large diameter hole 3451b have a circular cross section.

  The second retaining substrate 346 has a hole 3461 through which the contact portion 332c and the fitting portion 332d of the second plunger 332 can be inserted. The hole 3461 has a stepped hole shape including a small diameter hole 3461a having an opening on the surface side of the holding substrate 341, and a large diameter hole 3461b formed coaxially with the small diameter hole 3461a and having a diameter larger than the small diameter hole 3461a. Make. The small diameter hole 3461a and the large diameter hole 3461b have a circular cross section.

  The large diameter hole 3451b of the first retaining board 345 and the large diameter hole 3461b of the second retaining board 346 have the same diameter, and the diameter is larger than the diameter of the flange portion 332b of the second plunger 332.

  Since the retaining substrate 342 supports the outer periphery of the flange portion 332b of the second plunger 332 and the outer periphery of the contact portion 332c while sliding, the rectilinearity of the second plunger 332 can be improved.

  According to the fifth embodiment of the present invention described above, when the retaining member for the elastic member is processed in advance using the second sheet member, when the retaining substrate is removed from the main substrate, the reason for static electricity, etc. Thus, it is possible to prevent the elastic member attached to the second plunger from following the second plunger and coming off from the holding substrate.

  Further, according to the fifth embodiment, since the end portion of the second plunger that is to be fitted with the elastic member has a stepped hole shape, it is possible to achieve a certain degree of strong fitting. it can. Even in such a strong fitting, since the second sheet member is provided, the second plunger and the elastic member can be reliably separated when removing the retaining substrate from the holding substrate.

  Furthermore, according to the fifth embodiment, among the end portions of the elastic member, the end portion that contacts the second plunger is flattened so as to pass through a plane orthogonal to the longitudinal direction of the elastic member. The conduction between the elastic member and the second plunger is ensured.

  Instead of providing the protruding piece on the second sheet member, the diameter of the opening of the second sheet member may be smaller than the diameter of the large-diameter hole 3431b. The diameter of the opening in this case may be equal to the inner diameter of the protruding piece 344a of the retaining sheet 344.

(Embodiment 6)
FIG. 27 is a diagram illustrating a configuration of a main part of a conductive contact unit according to Embodiment 6 of the present invention. FIG. 28 is a diagram showing an outline of assembly of the conductive contact unit according to the sixth embodiment. The conductive contact unit 16 shown in these drawings includes a circuit board 2, a conductive contact 330, and a conductive contact holder 540. The external configuration of the conductive contact unit 16 is the same as that shown in FIG.

  The conductive contact holder 540 is opposed to the semiconductor integrated circuit 100 among the holding substrate 541 having a plurality of holes penetrated in the thickness direction in order to insert the conductive contact 330 and the surface of the holding substrate 541. And a retaining substrate 342 that is detachably attached to the surface on the side to be held and retains the second plunger 332 of the conductive contactor 330 while retaining it.

  The holding substrate 541 includes a first holding substrate 542 and a second holding substrate 543 formed of a conductive material. The two substrates are stacked in the plate thickness direction and attached using screws or the like (not shown). . The plate thickness of the first holding substrate 542 and the plate thickness of the second holding substrate 543 are generally different.

  The first holding substrate 542 is formed with a first hole 5421 that penetrates in the plate thickness direction and accommodates and holds a part of the conductive contact 330. The first hole 5421 has an opening on the surface of the first holding substrate 542 that is not in contact with the second holding substrate 543, and has a small-diameter hole 5421a through which the tip 331a of the first plunger 331 can be inserted. And a large diameter hole 5421b having a diameter larger than that of the small diameter hole 5421a. The small diameter hole 5421a and the large diameter hole 5421b have a circular cross section.

  The second holding substrate 543 is formed with a second hole portion 5431 that penetrates in the thickness direction and accommodates and holds a part of the conductive contact 330. The second hole 5431 has an opening on the surface of the second holding substrate 543 that is not in contact with the first holding substrate 542, and is inserted through the contact portion 332c and the fitting portion 332d of the second plunger 332. It has a stepped hole shape including a possible small diameter hole 5431a and a large diameter hole 5431b having a diameter larger than that of the small diameter hole 5431a. The small diameter hole 5431a and the large diameter hole 5431b have a circular cross section. The small diameter hole 5431a functions to prevent the spring member 333 from coming off. The depth of the small diameter hole 5431a is more preferably about 300 μm.

  In a state where the first holding substrate 542 and the second holding substrate 543 are stacked, the first hole portion 5421 and the second hole portion 5431 are arranged coaxially.

  Instead of forming the small diameter hole 5431a in the second holding substrate, the holding substrate is formed by using a plate-like member having an opening having the same diameter as the small diameter hole 5431a and made of the same material as the first holding substrate 542 and the like. May be. In this case, only the hole corresponding to the large-diameter hole 5431b may be formed as the second holding substrate.

  According to the sixth embodiment of the present invention described above, the same effects as in the fifth embodiment can be obtained.

(Other embodiments)
So far, the first to sixth embodiments have been described in detail as the best mode for carrying out the present invention, but the present invention should not be limited only by those embodiments. FIG. 29 is a diagram showing a configuration of a holding substrate and a conductive contact applied in another embodiment of the present invention. The holding substrate 41-2 shown in the figure has a hole 411-2 for inserting the conductive contact. Similar to the hole portion 411, the hole portion 411-2 has a small diameter hole 411a and a large diameter hole 411b, and an end portion on the opposite side to the small diameter hole 411a has a maximum diameter hole 411c larger in diameter than the large diameter hole 411b. .

  The first plunger 31 and the spring member 33 are accommodated in the hole portion 411-2. As shown in FIG. 29, a retaining cap 900 is attached to the upper end of the spring member 33. The retaining cap 900 may be fixed so as to be press-fitted into the maximum diameter hole 411c, or may be fixed to the maximum diameter hole 411c by adhesion. In any case, the outer diameter of the retaining cap 900 is substantially equal to the diameter of the maximum diameter hole 411c.

  In this case, the same effect as in the fourth embodiment described above can be obtained.

  By the way, in this invention, as shown in FIG. 30, you may use the film 1000 for earth which printed the pattern which connects the conductive contact for earth. FIG. 31 is a diagram showing the configuration of the conductive contact unit when the grounding film 1000 is used. A conductive contact unit 17 shown in FIG. 31 includes a conductive contact holder 1240 to which a grounding film 1000 facing the retaining substrate 242 is attached on the surface of the holding substrate 241. The configuration of the conductive contact unit 17 excluding the configuration of the conductive contact holder 1240 is the same as the configuration of the conductive contact unit 14 shown in FIG.

  According to the conductive contact unit 17 configured as described above, the electrical connection between the conductive contacts for grounding can be further strengthened, and a strong ground line can be constructed. Note that the pattern shown in FIG. 30 is merely an example.

  Thus, the present invention can include various embodiments and the like not described herein, and various design changes and the like can be made without departing from the technical idea specified by the claims. It is possible to apply.

  As described above, the conductive contact unit according to the present invention is useful when performing an electrical characteristic test on a semiconductor integrated circuit or the like.

Claims (5)

A plurality of conductive contacts each having a first member that can be expanded and contracted in the longitudinal direction and a second member that can contact the first member, and for inputting / outputting signals to / from an inspection object that is in contact with the second member With the child,
A holding substrate formed of an insulating material and having a hole capable of accommodating the first member of each of the plurality of conductive contacts;
The second member formed of an insulating material and held by each of the plurality of conductive contacts is retained and held on the surface of the holding substrate on the side facing the inspection target. A retaining substrate that is detachably attached in a state where the longitudinal axis of the member and the longitudinal axis of the second member coincide with each other;
With
The retaining substrate is
A main board;
A first sheet that can be inserted through the second member, has an opening formed with a protruding piece that protrudes in an inner circumferential direction, and is attached to a surface of the main substrate that faces the holding substrate. Members,
Conductive contact unit and having a. The conductive contact unit according to claim 1 , wherein the first sheet member is made of a thin film-like soft resin . The first member includes a first plunger that is in contact with a circuit board that generates a signal to be input to the inspection target, and an elastic member that is attached to the first plunger and is extendable in the axial direction of the first plunger. Including,
3. The conductive contact unit according to claim 1 , wherein the second member includes a second plunger that receives an elastic force from the elastic member while being in contact with the first member . The second plunger is
A contact portion in contact with the elastic member;
A fitting portion that is located on the end side of the contact portion, has a diameter smaller than the contact portion, and can be fitted to the end portion of the elastic member;
Conductive contact unit according to claim 3, wherein a. Of the end portions of the elastic member, at least a part of the end portion that contacts the second plunger is flattened so as to pass through a plane substantially orthogonal to the longitudinal direction of the elastic member. The conductive contact unit according to claim 3 or 4 .

Images