JP2010118256A - Spiral contactor and method of manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a spiral contactor endowed with excellent electrical connectivity and a method of manufacturing the same. <P>SOLUTION: In the spiral contactor 2 formed in a spiral shape from its root 2d to its tip 2a center and having its tip at the center of the spiral, there is provided a groove 2d along a length direction of the spiral contactor 2 at a center in a width direction of the spiral contactor 2, and the spiral contactor 2 is formed in a flat shape and a convex shape and a projection 2aa is provided on an upper face of the tip 2a so as to enable the spiral contactor to have excellent electrical connectivity. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a spiral contactor having a groove along the longitudinal direction of a spiral contact at the center in the width direction of a convex spiral contact having a tip at a spiral center, and a method of manufacturing the same.

5A and 5B show a conventional spiral contact, wherein FIG. 5A is a schematic view showing a spiral contact having a tip and a protrusion in the vicinity thereof, and FIG. 5B is a cross-sectional view taken along line BB shown in FIG. In the natural body, a convex sectional view is shown, and (c), (d), (e), (f), (g), (h), (i), and (j) are perspective views showing types of protrusions.
As shown in FIGS. 5 (a) and 5 (b), the spiral contact 102 is a convex spiral (vortex) in the natural body, but two spirals with the tip integrated at the center of the spiral are parallel. Is provided. A hemispherical projection is provided at the tip located at the center. The width of the spiral increases as it approaches the root 102b from the tip 102a, and a spiral portion 102c is provided from the root 102b toward the tip 102a.

  In the convex spiral contact 102 having a tip 102a at the center of the spiral, the roots 102b and 102b of the spiral contact 102 are arranged at positions facing each other, and the roots 102b and 102b are directed toward the center of the spiral. The tip 102a which stands | starts up and merges mutually in the center of a spiral is provided. That is, the tip 102a is further twisted and rotated while being maintained at the center by the double spiral supported from the left and right. When the spiral contact 102 comes into contact with a connection terminal (not shown) and pushes down the spiral contact 102 sequentially from the tip 102a, at least one sharp protrusion provided on the tip 102a of the spiral contact 102 102d comes into contact with the connection terminal with a twisting action and draws a minute circle, and the oxide film on the surface of the connection terminal is cut and excellent electrical connectivity can be obtained.

As shown in FIGS. 5C, 5D, 5E, and 5F, in the perspective view showing the form of the protrusion (projection 102d), one protrusion is provided in the vicinity of the tip 102a. The shape shows a semicircular shape, a quadrangular frustum shape, a triangular frustum shape, and a frustum shape.
When the protrusion 102d comes into contact with a connection terminal (not shown) and pushes down the spiral contact 102 in order from the tip 102a, the tip 102a is further twisted and rotated while the center of the spiral is maintained, so that the spiral shape is maintained. The at least one sharp protrusion 102d provided at the tip 102a of the contactor 102 draws a minute circle while being in contact with the connection terminal, so that the oxide film on the surface of the connection terminal is cut and excellent electrical connectivity can be obtained. it can.

  FIG. 6 is a process diagram of a conventional method for manufacturing a spiral contact. As shown in FIG. 6, in the manufacturing method of a spiral contactor having a spiral contact having a tip at the center of a spiral, the first step is to prepare a metal plate 104, and at least one metal plate 104 is provided on the surface of the metal plate 104. A recess 104a is formed at the tip of the spiral contact.

In the second step, a photoresist 105 is applied to the surface of the Cu foil 104 or a dry film is applied. A photomask 106 having a pattern of spiral contacts 102 is covered from above, and exposure is performed by irradiating light from above the photomask 106.
The shape of the photomask 106 is a pattern in which the spiral contact 102 is blackened. Further, a method using a reverse black and white pattern may be used.
In the third step, the photoresist 105 is developed so as to form a pattern of the photomask 106.
In the fourth process, the exposed surface 104b of the Cu foil 104 is further subjected to metal plating 107 composed of Au plating 107b and Ni plating 107a from above to form the spiral contact 102. The metal plating 107 here is preferably nickel alloy plating.

In the fifth step, the photoresist 105 is removed.
In the sixth step, a photoresist 105 is pasted or coated on the back surface of the Cu foil 104, a photomask 116 for making a hole is covered, and the photomask 116 is exposed to light and developed.
In the seventh step, a hole 104 c is formed in the Cu foil 104 by etching from the back surface of the Cu foil 104.
In the eighth step, the photoresist 105 on the back surface of the Cu foil 104 is removed.

FIG. 7 is a process diagram of a conventional method for manufacturing a spiral contactor. As shown in FIG. 7, in the ninth step, annealing is performed in a state where the center of the spiral of the spiral contactor turned upside down is pushed up from one side by a convex tool and deformed into a convex shape.
Specifically, a convex tool 112 is arranged below the spiral contact 102, and the forming is stabilized by annealing forming the spiral contact 102 pushed up from below by the convex tool 112 and deformed into a convex shape. That is, the spiral contact 102 deformed into a convex shape is heated and annealed to be formed into a convex shape. In this annealing forming, for example, heating is performed at 250 ° C., annealing is performed, and internal stress is removed.
In the tenth step, a mounting substrate 108 having a conductive land 108a is provided on the surface, a conductive paste (solder paste) 109 is applied to the upper surface of the land 108a, and a spiral contact 102 is formed on the upper surface of the land 108a. Position it.

In the eleventh step, the Cu foil 104 is removed by etching.
In the twelfth step, the connection terminal 111 is brought into contact with a spiral contactor 101 including a plurality of spiral contacts 102, 102. As a result, the protrusion 102d of the spiral contact 102 and the connection terminal 111 are connected, and the protrusion 102d is electrically connected while drawing a minute circle on the contact surface of the connection terminal 111 (see Patent Document 1).
Japanese Patent Application No. 2008-79940

  Conventionally, however, the spiral contactor can cope with various connection terminal shapes such as a hemispherical shape and a flat land shape, and there has been a problem that the electrical connection characteristics must be further improved.

  The present invention was devised to solve the above-described problem, and can be connected to connection terminals of various shapes, and the spiral contact is brought into contact with the connection terminal. A spiral contactor having excellent electrical connectivity by drawing a minute circle with one sharp projection provided at the tip of the spiral contact when it is pushed down in order and making contact with the connecting terminal while twisting, and its It is an object to provide a manufacturing method.

  The spiral contactor of the invention according to claim 1 is formed in a spiral shape from the root toward the tip center, and has a tip at the center of the spiral, and the spiral contactor has a center in the width direction of the spiral contact. A groove is provided along the longitudinal direction of the spiral contact.

  A spiral contactor according to a second aspect of the present invention is a spiral contactor having the same root, spirally formed from the root toward the center of the tip, and having a tip at the center of the spiral. Spiral contacts are formed in parallel with a space between each other, and the two spiral contacts are combined at the tip.

  The invention according to claim 3 is the spiral contactor according to claim 1 or 2, wherein the spiral contactor is formed in a convex shape.

  The invention according to claim 4 is the spiral contactor according to claim 1 or 2, wherein a projection is provided on an upper surface of the tip.

According to a fifth aspect of the present invention, there is provided a spiral contactor manufacturing method comprising: a spiral contact formed in a spiral shape from a root toward a tip center, and having a tip at the spiral center; A spiral contactor manufacturing method comprising a groove along the longitudinal direction of the spiral contact at the center of the spiral contactor,
Prepare a Cu foil, apply or apply a photoresist on the surface of the Cu foil, cover the photomask having the spiral contactor pattern from above, and irradiate light from above the photomask for exposure. A second step;
A third step of developing the photoresist so as to form a pattern of the photomask;
Further, a metal plating is performed on the exposed surface of the Cu foil from above, and a fourth step of forming the spiral contact,
A fifth step of removing the photoresist;
A sixth step of applying or applying a photoresist to the back surface of the Cu foil, covering with a photomask for opening a hole, irradiating the photomask with light and exposing and developing;
It is characterized by including.

  The invention according to claim 6 is the method of manufacturing the spiral contactor according to claim 5, wherein the spiral contact of the spiral contactor turned upside down is pushed up from one side by a convex tool and deformed into a convex shape. And a ninth step of annealing and forming in a state where the film is annealed.

  The invention according to claim 7 is the manufacturing method of the spiral contactor according to claim 5, wherein in the spiral contactor manufacturing method, at least one surface of the Cu foil is provided before the second step. It includes a first step of forming a recess at a position of the tip of the spiral contact.

  According to the invention which concerns on Claim 1 or Claim 2, while connecting also to the connection terminal of various shapes, when a spiral contactor contacts a connection terminal and pushes down a spiral contactor in order from a front-end | tip At least one sharp protrusion provided on the tip of the spiral contact contacts the connection terminal with a torsional motion and draws a minute circle, thereby cutting off the oxide film on the surface of the connection terminal and providing excellent electrical connection Can have sex.

  According to the invention of claim 3, the spiral contact formed in a convex shape can be connected to connection terminals of various shapes, and the spiral contact is brought into contact with the connection terminal to form a spiral shape. When the contacts are pushed down sequentially from the tip, the spiral contacts come into contact with the connection terminals with a torsional motion, and by drawing a minute circle, the oxide film on the surface of the connection terminals is cut and excellent electrical connectivity is achieved. be able to.

  According to the invention of claim 4, it is possible to connect to connection terminals of various shapes, and when the spiral contact comes into contact with the connection terminal and pushes down the spiral contact in order from the tip, the spiral contact At least one sharp projection provided at the tip of the child contacts the connection terminal with a torsional motion and draws a minute circle, thereby tearing the oxide film on the surface of the connection terminal and having excellent electrical connectivity Can do.

  According to the fifth aspect of the present invention, the two spiral contactors having grooves of various lengths along the longitudinal direction of the center in the width direction of the spiral contactor are spaced apart from each other. Spiral contacts formed in parallel can be easily formed.

  According to the invention of claim 6, a convex spiral shape having excellent spring characteristics is obtained by performing annealing forming in a state in which the spiral center of the spiral contactor is pushed up by a convex tool and deformed into a convex shape. A contact can be formed.

  According to the invention of claim 7, the protrusion can be formed at and near the tip of the convex spiral contact, and when the convex spiral contact in contact with the connection terminal is pushed down sequentially from the tip. Then, at least one sharp projection provided at the tip of the convex spiral contactor twists and rotates while contacting the connection terminal to draw a minute circle, and tears the oxide film on the surface of the connection terminal In addition, excellent electrical connectivity can be obtained.

Embodiments of a spiral contactor and a manufacturing method thereof according to the present invention will be described below in detail with reference to the drawings.
FIG. 1 shows a spiral contact for explaining an embodiment of the present invention, (a) is a schematic view showing a spiral contact having a tip and a protrusion in the vicinity thereof, and (b) is (a). Is a sectional view taken along line AA shown in FIG.
As shown in FIGS. 1A and 1B, the spiral contact 2 is a convex spiral (spiral) in a natural body, but is formed in a spiral shape from the root 2b toward the center of the tip 2a. In the spiral contact 2 having a tip 2 a at the center, a groove 2 d is provided at the center in the width direction of the spiral contact 2 along the longitudinal direction of the spiral contact 2.
A projection 2aa having a quadrangular pyramid shape is provided at the tip 2a located at the center thereof. The width of the spiral increases as it approaches the root 2b from the tip 2a, and a spiral portion 2c is provided from the root 2b toward the tip 2a. The width may be constant as it goes from the tip 2a to the root 2b. Although the thickness is also constant, the thickness may gradually increase from the tip to the base. Moreover, the core material which forms the spiral contact 2 is a nickel (Ni) base material, and Au plating is given to the surface.

  The length of the groove 2d is provided in a predetermined section between the root 2b of the spiral contact 2 and the tip 2a. The section can be set as appropriate.

  The length of the groove 2d of the spiral contact 2 can be defined as follows. That is, the two spiral contacts 2, 2 have the same roots 2b, 2b and are formed in a spiral shape from the root 2b toward the center of the tip 2a, and have a tip 2a at the center of the spiral. The elements 2 and 2 are formed in parallel with an interval therebetween, and the interval is referred to as a groove 2d, and the two spiral contacts 2 and 2 are combined at the tip 2a.

  The spiral contact 2 is formed in a convex shape, and has a protrusion 2aa on the upper surface of the tip 2a.

  As a result, it is possible to connect to connection terminals 11 and 11 ′ of various shapes, and when the spiral contact 2 comes into contact with the connection terminals 11 and 11 ′ and the spiral contact 2 is pushed down from the tip 2 a in order. The at least one sharp projection 2d provided at the tip 2a of the spiral contact 2 is in contact with the connection terminals 11 and 11 'while being twisted, and draws a minute circle, whereby the surface of the connection terminals 11 and 11' It is possible to cut the oxide film and to have excellent electrical connectivity.

  Moreover, although two spirals were paralleled and demonstrated as a double spiral, it may be a triple spiral, a quadruple spiral, or a plurality of spirals.

Further, as shown in FIGS. 1A and 1B, one protrusion 2aa is provided in the vicinity of the tip 2a. Although the shape shows a quadrangular pyramid shape, the shape of the protrusion 2aa is not limited to these, and may be a triangular pyramid shape, other pyramids and a conical shape, or other similar shapes.
When this protrusion 2aa comes into contact with a connection terminal (not shown) and pushes down the spiral contact 2 in order from the tip 2a, the tip 2a is further twisted and rotated while maintaining the center of the spiral. The at least one sharp protrusion 2aa provided at the tip 2a of the contactor 2 draws a minute circle while being in contact with the connection terminals 11 and 11 '(see FIGS. 3 and 4), and the connection terminals 11 and 11' Excellent electrical connectivity can be obtained while cutting the oxide film on the surface.
Although the protrusion 2aa rotates by being twisted without being decentered from the tip rotation center, a single protrusion 2aa slightly decentered from the tip rotation center may be provided.

  FIG. 2 is a process diagram of the manufacturing method according to the present invention. As shown in FIG. 2, in the manufacturing method of a spiral contactor having a spiral contact having a tip at the center of a spiral, the first step is to prepare a metal plate 4, and at least one metal plate 4 is provided on the surface of the metal plate 4. The recess 4a is formed at the position of the tip of the spiral contact. Since the metal plate 4 is preferably a Cu foil, the metal plate 4 is hereinafter referred to as a Cu foil 4. The thickness of the Cu foil 4 is a foil shape, for example, 0.08 mm, but is not limited thereto.

In the second step, a photoresist 5 is applied to the surface of the Cu foil 4 or a dry film is applied. A photomask 6 having a pattern of the spiral contact 2 is covered from above, and light is irradiated from above the photomask 6 for exposure.
The shape of the photomask 6 is a pattern in which the spiral contact 2 is blackened. Further, a method using a reverse black and white pattern may be used.
In the third step, the photoresist 5 is developed so as to form a pattern of the photomask 6.
In the fourth step, the exposed surface 4b of the Cu foil 4 is further subjected to metal plating 7 composed of Au plating 7b and Ni plating 7a from above to form the spiral contact 2. The metal plating 7 here is preferably nickel alloy plating. In addition, although nickel nickel alloy plating was used for metal plating, for example, it is not limited to this.

In the fifth step, the photoresist 5 is removed.
In the sixth step, a photoresist 5 is pasted or applied on the back surface of the Cu foil 4, and a photomask 16 for making a hole is covered, and the photomask 16 is exposed to light and developed.
In the seventh step, a hole 4c is formed in the Cu foil 4 from the back surface of the Cu foil 4 by etching.
In the eighth step, the photoresist 5 on the back surface of the Cu foil 4 is removed.

FIG. 3 is a process diagram of the manufacturing method according to the present invention. As shown in FIG. 3, in the ninth step, annealing forming is performed in a state where the center of the spiral of the spiral contact that is turned upside down is pushed up from one side by a convex tool and deformed into a convex shape.
Specifically, the convex tool 12 is arranged below the spiral contact 2, and the forming is stabilized by annealing and forming the spiral contact 2 with the convex tool 12 pushed up from below and deformed into a convex shape. That is, the spiral contact 2 deformed into a convex shape is heated and annealed to be formed into a convex shape. In this annealing forming, for example, heating is performed at 250 ° C., annealing is performed, and internal stress is removed. Although the heating temperature is 250 ° C. here, it is assumed to include around 250 ° C., and is not limited to this.
In the tenth step, a mounting substrate 8 having a conductive land 8a on the surface is provided, a conductive paste (solder paste) 9 is applied to the upper surface of the land 8a, and the spiral contact 2 is applied to the upper surface of the land 8a. Position it.

In the eleventh step, the Cu foil 4 is removed by etching.
In the twelfth step, the connection terminal 11 is brought into contact with the spiral contactor 1 composed of a plurality of spiral contacts 2, 2,. Thereby, the projection 2aa of the spiral contact 2 and the connection terminal 11 are connected, and the projection 2aa is electrically connected while drawing a minute circle on the contact surface of the connection terminal 11.

FIG. 4 is a process diagram of the manufacturing method according to the present invention. FIG. 4 is the same as the ninth to eleventh steps as shown in FIG.
In the twelfth step, the connection terminal 11 ′ is brought into contact with the spiral contactor 1 including the plurality of spiral contacts 2, 2. Thereby, the projection 2aa of the spiral contact 2 and the connection terminal 11 ′ are connected, and the projection 2aa is electrically connected while drawing a minute circle on the contact surface of the connection terminal 11 ′.
In this way, a good connection can be obtained for connection terminals of various shapes.

  The preferred embodiments have been described above. However, the present invention is not limited to the above-described embodiments, and can be appropriately changed without departing from the gist of the present invention. For example, the groove of the spiral contact may be in all or a part of the spiral contact in the longitudinal direction. Although at least one convex portion 2d is provided at the position of the tip 2a of the spiral contact 2, two, three, four, or more projections 2aa at the tip are possible. In addition, although two spirals are described in parallel as a double spiral, a plurality of spirals can be manufactured by a triple spiral or a quadruple spiral. In addition, the spiral contactor has a natural and convex shape, but may be a natural and flat shape. The metal plate 4 in the first step may be, for example, a SUS plate in addition to the copper plate (Cu foil).

The spiral contact for explaining the embodiment of the present invention is shown, (a) is a schematic diagram showing a spiral contact provided with a projection near the tip, and (b) is an AA line shown in (a) It is sectional drawing of this, and is a sectional view of convex shape in a natural body. It is process drawing of the manufacturing method which concerns on this invention. It is process drawing of the manufacturing method which concerns on this invention. It is process drawing of the manufacturing method which concerns on this invention. The spiral contact for demonstrating the conventional embodiment is shown, (a) is the schematic which shows the spiral contact which provided the protrusion near the front-end | tip, (b) is the BB line shown to (a). It is a sectional view, and is a sectional view of a natural and convex shape. It is process drawing which shows the manufacturing method of the spiral contact for demonstrating the conventional embodiment. It is process drawing which shows the manufacturing method of the spiral contact for demonstrating the conventional embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Spiral contactor 2 Spiral contact 2a Tip 2aa Protrusion 2b Root 2c Spiral part 2d Groove 4 Cu foil 5 Photoresist 6, 16 Photomask 7 Metal plating 8 Mounting board 9 Paste 11, 11 'Connection terminal 12 Convex tool

Claims (7)

  A spiral contact formed in a spiral shape from the root toward the center of the tip, and having a tip at the center of the spiral, a groove along the longitudinal direction of the spiral contact at the center in the width direction of the spiral contact A spiral contactor comprising:   Two spiral contacts having the same root and spirally formed from the root toward the center of the tip, and having a tip at the center of the spiral, the two spiral contacts being spaced apart from each other A spiral contactor formed in parallel, wherein the two spiral contacts are combined at the tip.   The spiral contactor according to claim 1, wherein the spiral contact is formed in a convex shape.   The spiral contactor according to claim 1, wherein a protrusion is provided on an upper surface of the tip. In a spiral contact formed in a spiral shape from the root toward the tip center, and having a tip at the spiral center, along the longitudinal direction of the spiral contact at the center in the width direction of the spiral contact A method of manufacturing a spiral contactor having a groove,
Prepare a Cu foil, apply or apply a photoresist on the surface of the Cu foil, cover the photomask having the spiral contactor pattern from above, and irradiate light from above the photomask for exposure. A second step;
A third step of developing the photoresist so as to form a pattern of the photomask;
Further, a metal plating is performed on the exposed surface of the Cu foil from above, and a fourth step of forming the spiral contact,
A fifth step of removing the photoresist;
A sixth step of applying or applying a photoresist to the back surface of the Cu foil, covering with a photomask for opening a hole, irradiating the photomask with light and exposing and developing;
A process for producing a spiral contactor comprising:   6. The ninth process according to claim 5, further comprising a ninth step of annealing forming in a state in which the center of the spiral of the spiral contactor turned upside down is pushed up from one side by a convex tool and deformed into a convex shape. Manufacturing method of spiral contactor.   The manufacturing method of the spiral contact includes a first step of forming at least one concave portion on the surface of the Cu foil at a position of a tip of the spiral contact before the second step. A method for manufacturing a spiral contactor according to claim 5.

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