JP5847832B2 - Substrate plating jig - Google Patents

Description

  The present invention relates to a plating jig for holding a substrate when electrolytic plating of the substrate is performed.

  When electrolytic plating is performed on a substrate such as a semiconductor wafer, a glass plate, or a ceramic plate, the plating jig that holds the substrate is configured such that the conductive pin contacts the conductive film of the substrate while holding the substrate. . Then, with the substrate held on the plating jig, the substrate is immersed in the electrolytic plating solution in the plating solution tank together with the jig, and current is supplied from the energizing pins to perform the electrolytic plating.

  However, since the current-carrying pins are exposed in the plating solution in the conventional plating jig, plating is also deposited on the current-carrying pins, the plating efficiency is poor, and it takes time to replace the current-carrying pins. .

  Up to now, as a technique for preventing the energizing pins from being exposed in the plating solution, for example, a sealing member for sealing the semiconductor wafer is provided so that the plating solution does not flow outside the plating surface of the semiconductor wafer. The thing which provided the cathode contact in the surface which does not contact a plating solution is reported (patent document 1).

  The present inventors also provided a current-carrying member with a U-shaped side surface instead of the current-carrying pin inside the seal packing, and this contacts the conductive film exposed on the semiconductor wafer surface and the member that conducts electricity to the external electrode. A semiconductor wafer plating jig is reported (Patent Document 2).

  However, although these techniques can prevent the current-carrying pins and current-carrying members from being exposed to the plating solution, the current-carrying pins and current-carrying members are not configured to reliably contact the semiconductor wafer to conduct electricity, Since the size of the current-carrying member is small, it takes time to replace it, and there is a problem that it takes time to replace the seal packing.

JP-A-6-108285 Japanese Patent No. 3847434

  Therefore, the present invention does not expose the current-carrying pins and current-carrying members to the plating solution in plating a substrate such as a semiconductor wafer, a glass plate, and a ceramic plate, and can reliably energize the substrate. It is an object to provide a plating jig that can be easily replaced.

As a result of intensive studies to solve the above problems, the present inventors have provided a plate-shaped first holding member, an annular seal packing having an inner peripheral portion and an outer peripheral portion, and the center of the annular seal packing. A second holding member having an opening formed on the side, and sandwiching and holding the substrate to be plated between the first holding member and the second holding member, thereby holding the inner peripheral portion of the annular seal packing And the tip of the outer peripheral portion is in close contact with the surface to be plated and the first holding member of the substrate to be plated, and the end of the substrate to be plated is held between the inner peripheral portion and the outer peripheral portion of the annular seal packing, In the substrate plating jig configured so that the surface to be plated is exposed in the opening, a substrate to be plated is provided by providing a specially shaped energizing member inside the annular seal packing used for the substrate plating jig. With current-carrying member is not exposed to the plating solution in the plating, can be reliably energized be plated substrate, moreover, replacement of the seal packing also found that easy, and accomplished the present invention.

That is, the present invention includes a plate-like first holding member and a second holding member provided with an annular seal packing having an inner peripheral portion and an outer peripheral portion and having an opening formed at the center side of the annular seal packing. And having the substrate to be plated interposed and held between the first holding member and the second holding member so that the inner peripheral portion and the outer peripheral portion of the annular seal packing are respectively plated surfaces of the substrate to be plated. The end of the substrate to be plated is held between the inner peripheral portion and the outer peripheral portion of the annular seal packing, and the surface to be plated of the substrate to be plated is exposed to the opening. A substrate plating jig,
An annular first energization member having a plurality of protruding contacts is provided inside the annular seal packing, and the substrate to be plated is sandwiched and held between the first holding member and the second holding member, thereby The substrate plating jig is characterized in that a surface to be plated and a protruding contact are in contact with each other inside an annular seal packing.

  When the substrate plating jig of the present invention is used, the current-carrying member is not exposed to the plating solution in the plating of a substrate such as a semiconductor wafer, a glass plate, or a ceramic plate, and the substrate can be reliably energized, and the seal packing can be easily replaced. It is.

It is a perspective view which shows the whole board | substrate plating jig | tool of this invention. It is a whole figure of the cyclic | annular 1st electricity supply member 5 which has the some protrusion contact (substantially trapezoid shape) used for the board | substrate plating jig | tool of this invention. It is A-A 'sectional drawing in FIG. It is drawing which shows a part of cyclic | annular 1st electricity supply member 5 which has the some protrusion contact (substantially square shape) used for the board | substrate plating jig | tool of this invention. It is drawing which shows a part of cyclic | annular 1st electricity supply member 5 which has the some protrusion contact (substantially triangular shape) used for the board | substrate plating jig | tool of this invention. It is drawing which shows a part of cyclic | annular 1st electricity supply member 5 which has several protrusion contact (substantially rod shape) used for the board | substrate plating jig | tool of this invention. It is a figure which shows the positional relationship of each member at the time of the 1st holding member 2 of the board | substrate plating jig | tool of this invention piled up on the 2nd holding member 3. FIG.

  Hereinafter, the description of the present invention will be continued with the drawings showing one embodiment of the present invention.

  FIG. 1 is a perspective view showing an entire substrate plating jig for holding a circular semiconductor wafer. In the figure, 1 is a substrate plating jig, 2 is a first holding member, 3 is a second holding member, 4 is an annular seal packing, 5 is an annular first energizing member having a plurality of protruding contacts, 6 is an opening, 7 is a second energizing member, 8 is a substrate base, 9 is a semiconductor wafer, 10 is a handle, and 11 is a hinge mechanism.

  On the upper surface of the first holding member 2, a substrate base 8 having substantially the same shape as the semiconductor wafer 9 is provided. The height of the substrate base 8 is not particularly limited, but it needs to be high enough to provide a space for housing components such as the annular first energization member 5 having a plurality of protruding contacts inside the annular seal packing 4. is there. A second energizing member 7 that energizes the external electrode is provided on the upper surface of the first holding member 2. The second energizing member 7 has an annular first seal member having a plurality of protruding contacts inside the annular seal packing 4 by sandwiching and holding the semiconductor wafer 9 between the first holding member 2 and the second holding member 3. 1 It is in contact with the current-carrying member 5 and is provided at a position to be energized. The second energizing member 7 is energized by being connected to a conductive member (not shown) embedded in the first holding member 2 or drawn from the back surface.

  Although the shape of the said 2nd electricity supply member 7 will not be specifically limited if it is a shape which is easy to contact the cyclic | annular 1st electricity supply member 5 which has a some protrusion contact, For example, shapes, such as a leaf | plate spring and a coil spring, are mentioned. In order to make the contact more reliable, a third energization member (not shown) corresponding to the position where the second energization member 7 contacts the annular first energization member 5 having a plurality of protruding contacts. Is preferably provided. In this case, the contact method between the second energization member 7 and the third energization member is not particularly limited. For example, sliding contact using an outlet-type energization member is preferable.

  In the above description, the second energizing member 7 that energizes the external electrode is provided on the first holding member 2 and is energized by contacting the annular first energizing member 5 having a plurality of protruding contacts. The energization from the external electrode to the annular first energizing member 5 having a plurality of protruding contacts is performed when the semiconductor wafer 9 is interposed between the first holding member 2 and the second holding member 3 and held. The method is not particularly limited as long as the sealing performance by the seal packing 4 is not hindered. As such a method, in addition to the above, the first holding member 2 is provided with a fourth energization member (not shown) for energizing the external electrode, and this is provided with an annular first energization member having a plurality of protruding contacts. For example, a method of directly connecting wires 5 to energize them can be used. The fourth energizing member used here is formed of a flexible conductive member (not shown), and when sandwiching and holding the semiconductor wafer 9 between the first holding member 2 and the second holding member 3, It is preferable that it bends or expands and contracts within the annular seal packing 4. Further, since the length of the fourth energizing member can be shortened, the connection between the fourth energizing member, the second energizing member 7 and the annular first energizing member 5 having a plurality of protruding contacts is in the vicinity of the hinge mechanism 11. It is preferable to carry out with.

  On the other hand, on the upper surface of the second holding member 3, an annular seal packing 4 and an opening 6 having an inner diameter slightly smaller than that of the semiconductor wafer 9 are provided on the center side of the annular seal packing 4. An annular first energization member 5 having a plurality of protruding contacts is provided inside the annular seal packing 4. Further, the second holding member 3 may be provided with a groove or a step so that the annular seal packing 4 can be simply fixed.

  The annular seal packing 4 is not particularly limited as long as it has an inner peripheral portion and an outer peripheral portion, but is preferably substantially C-shaped, substantially J-shaped, substantially U-shaped, substantially U-shaped, etc. Among these, a substantially U-shaped one having a peripheral edge higher than the inner peripheral part is preferable.

  An annular first energization member 5 having a plurality of protruding contacts is provided inside the annular seal packing 4. FIG. 2 shows an overall view of the annular first energization member 5 having a plurality of protruding contacts, and FIG. 3 shows an A-A ′ cross-sectional view of the annular first energization member 5 having a plurality of protruding contacts.

  The annular first energization member 5 having a plurality of protruding contacts is sized to fit inside the annular seal packing 4 and includes an annular energization member 5a and protruding contacts 5b. The protruding contacts 5b are, for example, a substantially trapezoidal shape, a substantially square shape, a substantially triangular shape, a substantially rod shape, etc., and a plurality of the protruding contact points 5b with an angle θ toward the center direction of the annular seal packing 4 or the opening 6 Provided. Another example of the shape of the protruding contact 5b is shown in FIGS. The protruding contact 5b may be formed separately from the annular energizing member 5a and may be joined by welding or the like. However, for ease of replacement, the annular energizing member 5a and the protruding contact 5b are made of a plate-shaped material. What was integrally formed by the press etc. is preferable. The number of the projecting contacts 5b varies depending on the size of the semiconductor wafer and the like and cannot be generally stated, but is preferably 6 or more. The angle θ at which the protruding contact 5b is provided on the annular energizing member 5a is 15 to 45 °, preferably 30 °. The material of the energizing member 5a and the protruding contact 5b is not particularly limited as long as it is a material to be energized, and examples thereof include materials having hardness and elasticity such as phosphor bronze and stainless spring steel. By using such an annular first energization member 5 having a plurality of protruding contacts, the semiconductor wafer 9 is sandwiched and held between the first holding member 2 and the second holding member 3. Energization to the is ensured. Further, by using the annular first energization member 5 having such a plurality of protruding contacts and providing this inside the annular seal packing 4, a semiconductor is provided between the first holding member 2 and the second holding member 3. When the wafer 9 is interposed and held, the annular seal packing 4 can be pressed with an equal pressure, and the deformation of the seal packing can be reduced. As a result, the sealing performance by the seal packing is improved, and the ingress of the plating solution into the energized portion can be suppressed.

  In order to fix the annular first energization member 5 having a plurality of protruding contacts inside the annular seal packing 4, a chemical fixing means such as a double-sided tape or an adhesive may be used. A physical fixing means such as a stopper may be used. If it is a physical fixing means such as screwing, it is easy to replace the annular seal packing 4 and the annular first energization member 5 having a plurality of protruding contacts.

  In order to sandwich and hold the semiconductor wafer 9 between the first holding member 2 and the second holding member 3, for example, the hinge mechanism 11 is provided on the first holding member 2 and the second holding member 3, and the hinge mechanism is provided. What is necessary is just to fix the other end which provided 11 with a clamp, a U-shaped instrument (none is shown), etc. Moreover, you may utilize the clamper of patent 3629396 for fixation of the 1st holding member 2 and the 2nd holding member 3. FIG.

  FIG. 7 shows the first holding member 2, the second holding member 3, the annular seal packing 4, and the annular first having a plurality of protruding contacts when the second holding member 3 is stacked on the first holding member 2. It is a figure which shows the positional relationship of the electricity supply member 5, the 2nd electricity supply member 7, the board | substrate stand 8, the semiconductor wafer 9, and the electrically-conductive member 12. FIG. By overlapping the second holding member 3 on the first holding member 2, the tips of the inner peripheral portion 4 a and the outer peripheral portion 4 b of the annular seal packing 4 are in close contact with the surface to be plated of the semiconductor wafer 9 and the first holding member 2, respectively. And sealed. Further, the end of the semiconductor wafer 9 is held between the inner peripheral portion 4a and the outer peripheral portion 4b of the annular seal packing 4, and an annular first energization member 5 having a surface to be plated of the semiconductor wafer 9 and a plurality of protruding contacts is provided. Contact is made inside the annular seal packing 4. Further, the second energization member 7 energized with the external electrode by the conductive member 12 contacts and energizes the annular first energization member 5 having a plurality of protruding contacts. As a result, the inside of the annular seal packing 4 is sealed, and the annular first energization member 5 having a plurality of protruding contacts and the second energization member 7 energized with the external electrode are not exposed to the plating solution.

  When electrolytic plating is performed using the substrate plating jig described above, the current-carrying member is not exposed to the plating solution, the substrate can be reliably energized, and the seal packing can be easily replaced.

Industrial application fields

  The substrate plating jig of the present invention can be used for manufacturing semiconductors.

DESCRIPTION OF SYMBOLS 1 ...... Board plating jig 2 ...... 1st holding member 3 ...... 2nd holding member 4 ...... Annular seal packing 4a ...... Inner peripheral part 4b ...... Outer peripheral part 5 ...... Annular which has a plurality of protruding contacts 1st energization member 5a ...... annular energization member 5b ...... projecting contact 6 ...... opening 7 ...... 2nd energization member 8 ...... substrate base 9 ...... semiconductor wafer 10 ...... handle 11 ...... hinge mechanism 12 ...... conductive Element

Claims (3)

A plate-like first holding member; and a second holding member provided with an annular seal packing having an inner peripheral portion and an outer peripheral portion and having an opening formed at the center side of the annular seal packing, By sandwiching and holding the substrate to be plated between the holding member and the second holding member, the inner peripheral part and the outer peripheral part of the annular seal packing are respectively the surface to be plated and the first holding member of the substrate to be plated. The substrate plating jig is configured so that the end of the substrate to be plated is held between the inner peripheral portion and the outer peripheral portion of the annular seal packing, and the surface to be plated of the substrate to be plated is exposed to the opening. Because
Said fourth current-carrying member provided which is formed by a flexible conductive member in electrical communication with the external electrode to the first holding member is provided with a first energizing member annular having a plurality of projecting contact points inside the annular seal packing, wherein The fourth energizing member is directly connected to the first energizing member by wiring and energized, and the substrate to be plated is sandwiched and held between the first holding member and the second holding member, whereby the surface to be plated of the substrate to be plated And a protruding contact contact inside the annular seal packing.   The substrate plating jig according to claim 1, wherein the plate-like first holding member and the second holding member are connected by a hinge mechanism. Fourth drive member, when holding entrapment by interposing the plating substrate between the first holding member and the second holding member, bending or stretching to those which fit into the interior of the annular seal packing according to claim 1 or 2. The substrate plating jig according to any one of 2 above.

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