Patent Publication Number: US-8968007-B2

Title: Connector and fabrication method thereof

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     An applicant claims priority under 35 U.S.C. §119 of Japanese Patent Application No. JP2012-143353 filed Jun. 26, 2012. 
     BACKGROUND OF THE INVENTION 
     The present invention relates to a connector configured to make a connection between pads of boards or a connection between an LGA (Land Grid Array) package and a pad of a board. 
     This kind of connector is disclosed in, for example, JP-A 2009-38171 (Patent Document 1), JP-A 2002-57416 (Patent Document 2) and JP-A 2011-86590 (Patent Document 3). 
     As shown in  FIG. 28  and  FIG. 29 , each of the connectors disclosed in Patent Document 1 and Patent Document 2 is made by forming a conductor  2  on an insulation-base body  1  which has a sheet-shape, and bending the conductor  2  together with the insulation-base body  1 . 
     As shown in  FIG. 30 , the connector of Patent Document 3 has an insulation-elastic sheet  5  which has projection portions  4  and  4 ′, and through holes  7 . A conductor  6  is plated on the projection portion  4 , an inner side of the through hole  7 , and the opposite projection portion  4 ′. The conductor  6  serves as a contact  3 . A part of the conductor  6  which is positioned between the projection portion  4  and the through hole  7  extends in an angle of about 45 degrees so that stress applied to the contact  3  is reduced. 
     In Patent Document 1, height of the contact is determined by length of the conductor  2  (length of the conductor  2  which is spread out), and the length is determined by an interval between the contacts. In detail, if the interval between the contacts is small, the height of the contact would not be large. As a result, a sufficient contact pressure is not ensured, or the contact may not follow deformation of a board. 
     The connector of Patent Document 2 is not suitable for the connection with pads, such as pads of an LGA package, arranged in the matrix form. 
     The connector of Patent Document 3 has a problem that manufacturing process is complicated and requires a high cost. Stress is concentrated on a bent-portion of the conductor  6  positioned in the vicinity of the through hole  7 . Thus, the conductor  6  may be broken. 
     SUMMARY OF THE INVENTION 
     It is an object of the present invention to provide a low cost connector which ensures a sufficient contact pressure and has a long connection life. It is also an object of the present invention to provide a fabrication method of the connector. 
     One aspect of the present invention provides a connector comprising: a base member having a plurality of contact-attachment portions and a plurality of openings, the contact-attachment portions being arranged in a matrix form that has a plurality of columns in a first horizontal direction and a plurality of rows in a second horizontal direction crossing the first horizontal direction, the openings corresponding to the contact-attachment portions, each of the openings piercing the base member in a vertical direction perpendicular to both the first horizontal direction and the second horizontal direction, each of the openings extending in a predetermined direction crossing both the first horizontal direction and the second horizontal direction in a horizontal plane which is defined by the first horizontal direction and the second horizontal direction; and a plurality of contacts held by the base member and arranged in the matrix form, each of the contacts comprising an elastic-support member and a contact film, the elastic-support member having an upper end, an attachment surface and a lower end, the upper end and the lower end being opposite ends of the elastic-support member in the vertical direction, the attachment surface being positioned between the upper end and the lower end and facing the opening, the elastic-support member being attached to the corresponding contact-attachment portion and projecting upwards and downwards from the base member, the contact film comprising an insulation film and a conductive portion formed on the insulation film, the insulation film being positioned between the elastic-support member and the conductive portion, the conductive portion facing the opening and extending over the upper end, the attachment surface and the lower end of the corresponding elastic-support member. 
     Another aspect of the present invention provides a fabrication method of a connector which has a plurality of contacts and a base member holding the contacts, comprising: forming an elastic-base member to the base member, the base member having a plurality of contact-attachment portions and a plurality of openings, the contact-attachment portions being arranged in a matrix form that has a plurality of columns in a first horizontal direction and a plurality of rows in a second horizontal direction crossing the first horizontal direction, the openings corresponding to the contact-attachment portions, each of the openings piercing the base member in a vertical direction perpendicular to both the first horizontal direction and the second horizontal direction, each of the openings extending in a predetermined direction crossing both the first horizontal direction and the second horizontal direction in a horizontal plane which is defined by the first horizontal direction and the second horizontal direction, the elastic-base member having at least two elastic-support members and a connection portion which connects between the elastic-support members, each of the elastic-support members being attached to the contact-attachment portion and having an upper end, a lower end and an attachment surface, the upper end and the lower end being opposite ends of the elastic support member in the vertical direction, the attachment surface being provided between the upper end and the lower end and facing the opening; removing the connection portion; preparing a plurality of contact films each of which has a support portion made of insulation material, and a conductive portion formed on the support portion; and forming the plurality of contacts by attaching the contact films to the elastic-support members so that the conductive portion faces the opening and extends over the upper end, the attachment surface and the lower end of the elastic-support member. 
     An appreciation of the objectives of the present invention and a more complete understanding of its structure may be had by studying the following description of the preferred embodiment and by referring to the accompanying drawings. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is an oblique view showing a connector according to a first embodiment of the present invention. 
         FIG. 2  is an oblique view showing a base member of the connector of  FIG. 1 . 
         FIG. 3  is an oblique view showing the base member and contacts of the connector of  FIG. 1 . 
         FIG. 4  is a partial, cross-sectional view showing a cross-section taken along a predetermined direction P. 
         FIG. 5  is a top view showing the base member of  FIG. 2 . The base member is formed with an elastic-base member. 
         FIG. 6  is an oblique view showing the base member of  FIG. 5 . 
         FIG. 7  is a top view showing the base member of  FIG. 5 . Connection portions are removed. 
         FIG. 8  is an oblique view showing the base member of  FIG. 7 . 
         FIG. 9  is an oblique view showing an insulation-film base member formed with a conductive-portion base member. 
         FIG. 10  is an oblique view showing the insulation-film base member of  FIG. 9  formed with a protection member. 
         FIG. 11  is an oblique view showing a contact-film base member. 
         FIG. 12  is a partially enlarged, top view showing the contact-film base member of  FIG. 11 . 
         FIG. 13  is an oblique view showing a comb-jig. 
         FIG. 14  is a cross-sectional view showing a process for forming the contact by using a bending-jig. 
         FIG. 15  is an oblique view showing the base member of  FIG. 3 , the contact of  FIG. 3  and a frame. 
         FIG. 16  is an oblique view showing the connector of  FIG. 1 . The connector is positioned between an upper board and a lower board. 
         FIG. 17  is a cross-sectional view showing the connector which is put between the upper board and the lower board. 
         FIG. 18  is an oblique view showing a connector according to a second embodiment of the present invention. The base member is formed with elastic-support members. 
         FIG. 19  is a top view showing a process for forming the elastic-support member. The base member is formed with an elastic-base member. 
         FIG. 20  is an oblique view of  FIG. 19 . 
         FIG. 21  is an oblique view showing a connector according to a third embodiment of the present invention. The base member is formed with elastic-support members. 
         FIG. 22  is a top view showing a process for forming the elastic-support member. The base member is formed with the elastic-base members. 
         FIG. 23  is an oblique view of  FIG. 22 . 
         FIG. 24  is an oblique view showing a connector according to a fourth embodiment of the present invention. An upper side of the connector is illustrated. 
         FIG. 25  is an oblique view showing an under side of the connector of  FIG. 24 . 
         FIG. 26  is an oblique view showing the connector of  FIG. 24 . The connector is positioned between an LGA package and the lower board. 
         FIG. 27  is a cross-sectional view showing the connector of  FIG. 24 . The connector is put between the LGA package and the lower board. 
         FIG. 28  showing a connector disclosed in Patent Document 1. 
         FIG. 29  showing a connector disclosed in Patent Document 2. 
         FIG. 30  showing a connector disclosed in Patent Document 3. 
     
    
    
     While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It should be understood, however, that the drawings and detailed description thereto are not intended to limit the invention to the particular form disclosed, but on the contrary, the intention is to cover all modifications, equivalents and alternatives falling within the spirit and scope of the present invention as defined by the appended claims. 
     DESCRIPTION OF PREFERRED EMBODIMENTS 
     First Embodiment 
     With reference to  FIG. 1 ,  FIG. 16  and  FIG. 26 , a connector  10  according to an present embodiment of the present invention is configured to electrically connect pads (not shown) of a board  900  or pads (not shown) of an LGA package  1000  with pads  960  of a board  950 . Each of the board  900  and the LGA package  1000  is arranged above (+Z side) the connector  10  while the board  950  is arranged under (−Z side) the connector  10 . 
     As shown in  FIG. 1 , the connector  10  of the present embodiment comprises a base member  100 , a plurality of contacts  200  held by the base member  100  and a frame  300  holding the base member  100 . The contacts  200  are arranged in a matrix form that has a plurality of columns in an X direction (a first horizontal direction) and a plurality of rows in a Y direction (a second horizontal direction). The connector  10  of the present embodiment has forty-nine contacts  200  in total. The contacts  200  are arranged in a matrix form with 7 rows and 7 columns. 
     As shown in  FIG. 1  and  FIG. 2 , the base member  100  has a plate-like shape. In detail, the base member  100  has a square tile-shape. The base member  100  comprises a plurality of openings (openings  110  and rear-openings  120 : described later) and a plurality of contact-attachment portions  130 . Similarly to the contacts  200 , the contact-attachment portions  130  are arranged in the matrix form. The base member  100  is made of a metal sheet. A surface of the metal sheet is insulated, for example, by an insulation coating or the like. 
     As shown in  FIG. 2 , the contact-attachment portion  130  is positioned between the opening  110  and the rear-opening  120 . The openings  110  (the rear-openings  120 ) pierce the base member  100  in a Z direction (a vertical direction). 
     As understood from  FIG. 4 , the opening  110  of the left contact-attachment portion  130  and the rear-opening  120  of the right contact-attachment portion  130  are formed as one opening. In other words, the opening positioned between the neighboring contact-attachment portions  130  in the predetermined direction P serves as the opening  110  for one of the contact-attachment portions  130  and also serves as the rear-opening  120  for the other one of the contact-attachment portions  130 . 
     As seen from a different angle, the base member  100  has a plurality of long openings extending in the predetermined direction P. One or more contact-attachment portions  130  are provided in each of the long openings so as to divide the long opening into two or more openings in the predetermined direction P. Especially, in the long opening where two or more contact-attachment portions  130  are provided, the contact-attachment portions  130  are arranged at regular intervals in the predetermined direction P. 
     As understood from  FIG. 1  and  FIG. 2 , the predetermined direction P crosses both the X direction and the Y direction in an XY plane (a horizontal plane). The openings  110  extend in the predetermined direction P. Therefore, a size L 1  of the opening  110  in the predetermined direction P is larger than an interval L 2  between the contact-attachment portions  130  in the X direction and in the Y direction. 
     The predetermined direction P of the present embodiment forms an angle of 45 degrees with both the X direction and the Y direction. The angle of 45 degrees can make the size L 1  of the opening  110  largest in the predetermined direction P. 
     As shown in  FIG. 1 ,  FIG. 3  and  FIG. 4 , the contact  200  has a barrel-like shape, and is attached to the contact-attachment portion  130  of the base member  100 . 
     As best shown in  FIG. 4 , the contact  200  comprises an elastic-support member  220  and a contact film  260 . The elastic-support member  220  has an upper end  222 , an attachment surface  226 , a lower end  224  and a rear surface  228 . The upper end  222  and the lower end  224  are opposite ends in the Z direction (the vertical direction). The attachment surface  226  is provided between the upper end  222  and the lower end  224 . The rear surface  228  is positioned opposite to the attachment surface  226  in the predetermined direction P. 
     The elastic-support member  220  is attached to the base member  100  so that the contact-attachment portion  130  is positioned at the center of the elastic-support member  220 . In other words, the contact-attachment portion  130  is entirely embedded in the elastic-support member  220 . According to this structure, the elastic-support members  220  are positioned with accuracy in the X direction and the Y direction. Moreover, the elastic-support members  220  are securely held and prevented from sliding from the contact-attachment portion  130 . 
     The elastic-support members  220  project in the +Z direction (upwards) and the −Z direction (downwards) from the base member  100 . In other words, the upper end  222  and the lower end  224  of each of the elastic-support members  220  are distant from the base member  100  in the Z direction. The contacts  200  absorb variations of sizes in the Z direction of pads of the connection objects (the boards  900  and  950 : see  FIG. 16 ) which are positioned on and under the contacts  200 . Therefore, the contacts  200  are connected with the connection objects with reliability. 
     As shown in  FIG. 4 , the attachment surface  226  of the elastic-support member  220  faces the opening  110 . The rear surface  228  faces the rear-opening  120 . In other words, the elastic-support member  220  is positioned between the opening  110  and the rear-opening  120  in the predetermined direction P. 
     As shown in  FIG. 3  and  FIG. 4 , the contact film  260  has a rectangular shape. The contact film  260  comprises an insulation film (support portion)  262  and a conductive portion  264  formed on the insulation film  262 . The insulation film  262  is positioned between the elastic-support member  220  and the conductive portion  264 . The conductive portion  264  faces the opening  110 , and extends over the upper end  222 , the attachment surface  226  and the lower end  224  of the elastic-support member  220 . Therefore, the conductive portion  264  connects the upper end  222  of the elastic-support member  220  with the lower end  224  of the elastic-support member  220 . 
     A length of the conductive portion  264  of the present embodiment is longer than an interval (L 2 : see  FIG. 2 ) between the elastic-support members  220  in the X direction and the Y direction. As a result, the elastic-support member  220  which has a large size in the Z direction can be used for the connector  10 . According to the present embodiment, each of the contacts  200  can be connected with the upper and the lower connection objects (the pads of the board or the pads of the LGA package) with sufficient contact pressure. 
     The attachment surface  226  of the elastic-support member  220  is a convexly curved-surface in the predetermined direction P. The rear-surface  228  of the present embodiment has also a convexly curved-surface in the predetermined direction P. In other words, each of the cross-sections of the attachment surface  226  and rear surface  228  has an arc-shape in a plane defined by the predetermined direction P and the Z direction. The elastic-support member  220  has the convexly curved-surface so that stress does not concentrate on a part (for example, the conductive portion  264 ) of the contact film  260  when the contact film  260  is attached to the elastic-support member  220  (described later). 
     The above-described base member  100  is made of the metal, however, the material is not limited to the metal. For example, the base member  100  may be made of an insulation material (polyimide film or resin sheet or the like) as long as the insulation material has higher stiffness than the elastic-support member  220 . The surface of the base member  100  is coated with insulation material so that short circuit, for example, between the base member  100  and the conductive portion  264  of the contact  200  may not occur. 
     The base member  100  has a central area and a peripheral area  150  enclosing the central area. The openings  110  are formed on the central area. Eight positioning holes  152  are formed on the peripheral area  150 . In detail, the positioning holes  152  are positioned in the vicinity of the four corners and middle parts of the four sides of the peripheral area  150  of the base member  100 . The positioning holes  152  correspond to the positioning projections  302  of the frame  300 . As understood from  FIG. 1  and  FIG. 2 , the base member  100  is symmetric with respect to each of two diagonal lines. The arrangement of the matrix form of the base member  100  is made of seven columns and seven rows, i.e., the number of the columns is same as that of the rows. The arrangement of the contacts  200  is not changed even after the connector  10  is rotated 180 degrees around an axis in parallel to the Z direction (see  FIG. 1 ). Therefore, it is sufficient that the number of the positioning holes  152  is two. However, the number of the positioning hole  152  may be three or more. Especially, if the numbers of the columns and the rows of the contacts  200  are different from each other, it is preferred that three or more positioning holes  152  are provided, or that two positioning holes  152  is provided and the connector  10  is formed so as to have an asymmetrical shape with respect to a line linking two positioning holes  152 . 
     As shown in  FIG. 1  and  FIG. 15 , the frame  300  holds and fixes the base member  100 . The frame  300  has a square-shape. The frame  300  has an opening formed at the center and a receiving portion  340  which holds the base member  100 . The receiving portion  340  is formed around the opening and recessed downwards from an upper surface  303 . Eight positioning projections  302  are formed on the receiving portion  340 . The positioning projections  302  correspond to the positioning holes  152  of the base member  100 . Height of the positioning projection  302  is preferred to be less than the upper surface  303 . As shown in  FIG. 16 , the frame  300  of the present embodiment further has two positioning projections  310  and two positioning projections  320 . The positioning projections  310  are inserted into the positioning holes  920  of the board  900  (the upper connection object) The positioning projections  320  are inserted into the positioning holes  970  of the board  950  (the lower connection object). 
     The base member  100  of the present embodiment is made of metal having high stiffness so that the positioning holes  152  may be omitted. In this case, a position-adjustment can be made by fitting an edge of the base member  100  to a side surface  301  (see  FIG. 1  and  FIG. 15 ) of the frame  300 . The sizes of the receiving portion  340  and the base member  100  are preferably determined so that no clearance appears between the receiving portion  340  and the base member  100 . However, the base member  100  made of the aforementioned insulation material or the like may be deformed (warped) when the edge of the base member  100  is fit to the side surface  301  of the frame  300 . In this case, the position-adjustment is preferably made by using the positioning holes  152  of the base member  100  and the positioning projections  302  of the frame  300 . 
     Hereinafter, an explanation will be made about a method for manufacturing the connector  10  which has the above-described structure with reference to the drawings. 
     With reference to  FIG. 2 , a square metal sheet is obtained, for example, by punching a metal-base member. The positioning holes  152  and the openings  110  (the rear-openings  120 ) are formed on the metal sheet. The positioning holes  152 , the openings  110 , and the rear-openings  120  may be formed by a laser process, a punching process or a press process or the like. The process of punching the metal-base member and the process of forming the positioning holes  152 , the openings  110 , and the rear-openings  120  may be carried out at one time. 
     Next, as shown in  FIG. 5  and  FIG. 6 , elastic-base members  240  are formed to the base member  100  by an injection molding or the like. Each of the elastic-base members  240  is formed in a line in a direction perpendicular to the predetermined direction P. In detail, each of the elastic-base members  240  has the elastic-support member(s)  220  and connection portions  230 . The elastic-support member  220  encloses the contact-attachment portion  130  of the base member  100 . The connection portion  230  connects between the elastic-support members  220  neighboring in the direction perpendicular to the predetermined direction P. The connection portion  230  is thinner than the elastic-support member  220 . 
     After that, as shown in  FIG. 7  and  FIG. 8 , the connection portions  230  are removed from the elastic-base member  240 . The connection portions  230  may be removed by a laser-cutting, press process or the like. As a result of undergoing the above-processes, the base member  100  which has the elastic-support members  220  attached to the contact-attachment portions  130  can be obtained. As understood from  FIG. 4 , the contact-attachment portion  130  is positioned at the center of the elastic-support member  220 . The contact-attachment portion  130 , i.e. a part of the base member  100 , is entirely embedded in the elastic-support member  220 . In the present embodiment, the elastic-support members  220  are obtained by removing the connection portions  230  from the elastic-base member  240 , however, the elastic-support members  220  may be directly formed to the corresponding contact-attachment portions  130 . 
     With reference to  FIG. 7  and  FIG. 8 , an explanation will be made about a process for pasting the contact film  260  to the elastic-support member  220 . As shown in  FIG. 4 , adhesive is put on the upper end  222  and the lower end  224 , and the contact film  260  is pasted on and adhered to the elastic-support member  220 . 
     The contact films  260  are pasted on the corresponding elastic-support members at one time by using a jig and a sheet on which a plurality of the contact films  260  are formed. In detail, as shown in  FIG. 9 , a conductive pattern including a plurality of conductor-base members  274  is formed on an underside of the insulation-film base member  272  (i.e., one of surfaces of the insulation-film base member  272 ). The conductive pattern of the present embodiment is formed by photolithography or plating and is made from a multilayer film (metal film) of Au/Ni/Cu or the like. As clear from  FIG. 9 , each of the conductor-base members  274  extends in the predetermined direction P. 
     As shown in  FIG. 10 , a protection member  290  is pasted to an insulation-film base member  272  to cover the conductor-base member  274  in order to protect the conductor-base member  274 . The protection member  290  is a protection tape or a protection sheet which has an adhesive side. By pasting the protection member  290 , a total thickness becomes larger so that the handling of the sheet can be improved. 
     As shown in  FIG. 11 , cuts  280 , the positioning holes  292  and rectangular holes  288  are formed on an upper side of the insulation-film base member  272  (i.e. the opposite side of the underside). In detail, the press process or the laser process is carried out for the upper side of the insulation-film base member  272  so that a plurality of the cuts  280  is formed. The upper side of the insulation-film base member  272  is formed with cuts corresponding to the positioning holes  292  and the rectangular holes  288 . Then, unnecessary part in the holes is removed. The cuts  280  correspond to the openings  110  of the base member  100  (see  FIG. 2 ). The rectangular holes  288  correspond to the rear-openings  120  which are not integrated with the openings  110 . The positioning holes  292  correspond to the positioning holes  152  of the base member  100 . 
     In detail, as shown in  FIG. 12 , the cut  280  has a rectangular U-shape. Two sides of the rectangular U-shape extend in the predetermined direction P, the remaining one side crosses the conductor-base member  274  and connects the above-described two sides. The conductor-base member  274  is divided by the cuts  280  so that a plurality of the conductive portions  264  is formed. The conductive portions  264  correspond to the elastic-support members  220  (see  FIG. 3  and  FIG. 12 ). Hereinafter, an area enclosed by the cuts  280  on three sides (i.e. an inner area of the rectangular U-shape) is called “a small piece  284 ”, a part continuous to the small piece  284  is called “a fixing portion  282 ”, and a part continuous to the fixing portion  282  and extending in the predetermined direction P is called “a supporting belt  286 ”. The small pieces  284  and the fixing portions  282  correspond to the contact films  260  (see  FIG. 3 ). 
     As shown in  FIG. 12 , the contact-film base member  270  provided with a plurality of the contact film  260  each of which comprises the insulation film  262  and the conductive portion  264  is obtained by making the cuts  280  on the insulation-film base member  272  and the conductor-base member  274 . Afterwards, an adhesive is pasted on the upper end  222  and the lower end  224  of the elastic-support member  220 . The fixing portion  282  of the contact-film base member  270  is adhered to the lower end  224 . In the present embodiment, the positioning holes  292  of the contact-film base member  270  are adjusted to the positioning holes  152  of the base member  100  so that the lower ends  224  of elastic-support members  220  can be adjusted to the fixing portions  282  of the contact films  260 . However, the lower ends  224  can be adjusted to the fixing portions  282  by another way. In the present embodiment, the adhesive is thermosetting adhesive. However, elastic adhesive or the like may be used. 
     As shown in  FIG. 13  and  FIG. 14 , a comb-jig  700  is set under the contact-film base member  270 . In detail, the comb-jig  700  has a plate-like base  710  having a square shape, a plurality of comb-teeth  720  projecting in the +Z direction (upwards) from the base  710  and positioning projections  730 . The comb-teeth  720  correspond to the openings  110 . In other words, the comb-teeth  720  are arranged in a matrix form that has a plurality of columns in the X direction and a plurality of rows in the Y direction. Each of the comb-teeth  720  has a cross-section which has a rectangular shape extending in the predetermined direction P in the XY plane. Bevel portions  725  are formed on upper ends of the comb-teeth  720  so that the comb-teeth  720  are smoothly inserted into the openings  110 . The height of the positioning projection  730  is no more than the height of the comb-teeth  720 . The positioning projections  730  correspond to the positioning holes  292  (see  FIG. 11 ) of the contact-film base member  270  and are positioned on an extended line of the diagonal line of the matrix form of the comb-teeth  720 . 
     As shown in  FIG. 12  to  FIG. 14 , the comb-teeth  720  of the comb-jig  700  are inserted into the openings  110  of the base member  100  from the underside (in the −Z direction), and the positioning projections  730  are inserted into the positioning holes  292  (see  FIG. 11 ) of the contact-film base member  270  and the positioning holes  152  positioned on the diagonal line of the base member  100 . As understood from  FIG. 14 , the small piece  284  is bent upwards (in the +Z direction) along the attachment surface  226  (see  FIG. 4 ) by the comb-teeth  720  and projects upwards (in the +Z direction) from the upper end of the comb-teeth  720 . As a result, the lower half part of the contact  200  is formed. 
     A bending-jig  800  which has a flat and large bottom surface is slid on the comb-teeth  720  of the comb-jug  700  so that the projected parts of the small pieces  284  are bent toward the elastic-support member  220 . The bent parts of the small pieces  284  are adhered to the upper ends  222  of the elastic-support members  220 . In order to smoothly slide the bending-jig  800 , a guide member may be used for guiding the bending-jig  800 . The comb-jig  700  and the bending-jig  800  are fixed to each other under the state where the bending-jig  800  covers all of the comb-teeth  720 . Afterwards, the adhesive pasted on the upper end  222  and the lower end  224  of the elastic-support member  220  is hardened. As described above, the adhesive of the present embodiment is the thermosetting adhesive. In the present embodiment, the connector  10  is sandwiched between the comb-jig  700  and the bending-jig  800 . The connector  10 , the comb-jig  700  and the bending-jig  800  are fixed by a clip or the like, and heated so that the adhesive is hardened. Finally, the comb-jig  700  and the bending-jig  800  are removed. 
     As understood from that the contact-film base member  270  is positioned on the base  710  of the comb-jig  700  in  FIG. 14 , in this state, the fixing portions  282  of the contact-film base member  270  are connected with the supporting belts  286  (see  FIG. 11  and  FIG. 12 ). In the present embodiment, the rectangular cuts  280  extend in the predetermined direction P. The small pierce  284  is larger than the fixing portion  282 , i.e., a connection portion between the fixing portion  282  and the supporting belt  286  is small. With this structure, the supporting belt  286  is separated from the fixing portions  282  at one time by peeling the supporting belt  286  in the predetermined direction P after removing the comb-jig  700 . As a result, as shown in  FIG. 15 , a structure (a connector intermediate) comprising the base member  100  and the contacts can be obtained. 
     As shown in  FIG. 15 , position-adjustment between the base member  100  and the frame  300  is made by inserting the positioning projection  302  of the frame  300  into the corresponding positioning holes  152  of the base member  100 . The base member  100  may be fixed to the frame  300 , for example, by press-fitting, laser welding, the potting of the adhesive and directly pasting with the adhesive. 
     As shown in  FIG. 16  and  FIG. 17 , the connector  10  is used between the board  900  and the board  950 . The positioning projections  310  of the frame  300  are inserted into the positioning holes  920  of the board  900 . The positioning projections  320  are inserted into the positioning holes  970  of the board  950 . As best shown in  FIG. 17 , the pads  910  of the board  900  are electrically connected with the pads  960  of the board  950  through the conductive portions  264  (see  FIG. 4 ). In addition, when the upper side of the board  900  and the underside of the board  950  are pressed, the contacts  200  is resiliently deformed so that the sufficient contact pressure can be obtained by restoring force. The opening  110  and the rear-opening  120  are provided at a front and a rear of the contact  200  so that the contact  200  can deform frontwards and rearwards in the predetermined direction P. In other words, a deformation volume of the attachment surface  226  of the contact  200  can be minimized as compared with the base member provided with only the opening  110 . The conductive portion  264  is prevented from breaking as the contact  200  is deformed. A holding means which holds a connection state (i.e. a state where the contacts  200  are resiliently deformed) may be provided to the connector  10 . 
     Second Embodiment 
     As shown in  FIG. 18  to  FIG. 20 , the second embodiment of the present invention relates to a variation example of a shape of the elastic-support member  220  of the contact  200  of the first embodiment (see  FIG. 1 ). Therefore, the contact film  260 , the base member  100  and the frame  300  (not shown) of the first embodiment are used for the second embodiment, therefore, an explanation about these components will be omitted. Similarly, the method for manufacturing the base member  100  and the process after the process for attaching the elastic-support members  220 A to the contact-attachment portions  130  is same as that of the first embodiment. Therefore, an explanation will be made about the process for forming the elastic-base member  240 A to the base member  100  and forming the elastic-support member  220 A. 
     As shown in  FIG. 18 , the elastic-support member  220 A of the present embodiment has an elliptic cylinder shape and is attached to the contact-attachment portion  130  of the base member  100 . The elastic-support member  220 A has an upper end  222 A, an attachment surface  226 A, a lower end (not shown) and a rear surface  228 A. The upper end  222 A and the lower end (not shown) are opposite ends of the elastic-support member  220 A in the Z direction (in the vertical direction). The attachment surface  226 A is positioned between the upper end  222 A and the lower end  224 A. The rear surface  228 A is positioned opposite to the attachment surface  226 A in the predetermined direction P. In the present embodiment, the elastic-support member  220 A has a side surface  229 A in parallel with a plane defined by the Z direction and the predetermined direction P. 
     Similarly to the first embodiment, the elastic-support members  220 A project upwards (in the +Z direction) and downwards (in the −Z direction). In other words, the upper end  222 A and the lower end  224 A of each of the elastic-support members  220 A are distant from the base member  100 . The contacts  200  absorb variations of sizes in the Z direction of pads of the connection objects (the board  900 ,  950 : see  FIG. 16 ) which are positioned on and under the contacts  200 . Therefore, each of the contacts  200  is connected with each of the pads with reliability. The attachment surface  226 A of the elastic-support member  220 A faces the opening  110 , the rear surface  228 A faces the rear-opening  120 . In other words, the elastic-support member  220 A is positioned between the opening  110  and the rear-opening  120  in the predetermined direction P. 
     The elastic-support member  220 A is manufactured as follows. As shown in  FIG. 19  and  FIG. 20 , elastic-base members  240 A are formed to the base member  100  by an injection molding. As shown in  FIG. 19 , each of the elastic-base members  240 A is formed in a line in a direction perpendicular to the predetermined direction P. In detail, each of the elastic-base members  240 A has the elastic-support member(s)  220 A and a connection portion  230 A. The elastic-support members  220 A enclose the contact-attachment portions  130  of the base member  100 . The connection portion  230 A connects the elastic-support members  220 A neighboring in the direction perpendicular to the predetermined direction P. The connection portion  230 A of the present invention has the same diameter (shape) of the elastic-support member  220 A. 
     After that, as shown in  FIG. 18  and  FIG. 19 , the connection portions  230 A are removed from the elastic-base member  240 A. The connection portions  230 A may be removed by a laser-cutting, press process or the like. As a result of the above-processes, the base member  100  which has the elastic-support members  220 A attached to the contact-attachment portions  130  is obtained. Similarly to the first embodiment, the contact-attachment portion  130  is positioned at the center of the elastic-support member  220 A. The contact-attachment portion, i.e. a part of the base member  100 , is entirely embedded in the elastic-support member  220 A. According to this structure, the elastic-support member  220  is positioned with accuracy in the X direction and the Y direction. The elastic-support members  220  are securely held and prevented from sliding from the contact-attachment portions  130 . In the present embodiment, the elastic-support members  220 A are obtained by removing the connection portion  230 A from the elastic-base member  240 A. However, the elastic-support members  220 A may be directly formed to the corresponding contact-attachment portions  130 . 
     Third Embodiment 
     As shown in  FIG. 21  to  FIG. 23 , the third embodiment of the present invention is relates to a variation example of a shape of the elastic-support member  220  of the contact  200  (see  FIG. 1 ). Therefore, the contact film  260 , the base member  100  and the frame  300  (not shown) of the first embodiment are used for the second embodiment, therefore, an explanation about these components will be omitted. Similarly, the method for manufacturing base member  100  and the process after the process for attaching the elastic-support members  220 B to the contact-attachment portions  130  is same as that of the first embodiment, therefore, an explanation will be made about the process for forming the elastic-base member  240 B to the contact-attachment portions  130  and forming the elastic-support member  220 B. 
     As shown in  FIG. 21 , the elastic-support member  220 B of the present embodiment has an elliptic-circle shape and is attached to the contact-attachment portion  130  of the base member  100 . The elastic-support member  220 B has an upper end  222 B, an attachment surface  226 B, a lower end (not shown) and a rear surface  228 B. The upper end  222 B and the lower end (not shown) are opposite ends of the elastic-support member  220 B in the Z direction (in the vertical direction). The attachment surface  226 B is positioned between the upper end  222 B and the lower end  224 B. The rear surface  228 B is positioned opposite to the attachment surface  226 B in the predetermined direction P. In the present embodiment, the elastic-support member  220 B has a side surface  229 B in parallel with a plane defined by the Z direction and the predetermined direction P. 
     Similarly to the first embodiment, the elastic-support members  220 B project upwards (in the +Z direction) and downwards (in the −Z direction). In other words, the upper end  222 B and the lower end  224 B of each of the elastic-support members  220 B are distant from the base member  100 . The contacts  200  absorb variations of sizes in the Z direction of pads of the connection objects (the board  900 ,  950 : see  FIG. 16 ) which are positioned on and under the contacts  200 . Therefore, each of the contacts  200  is connected with each of the pads with reliability. The attachment surface  226 B of the elastic-support member  220 B faces the opening  110 , and the rear surface  228 B faces the rear-opening  120 . In other words, the elastic-support member  220 B is positioned between the opening  110  and the rear-opening  120 . 
     The elastic-support member  220 B is manufactured as follows. As shown in  FIG. 22  and  FIG. 23 , elastic-base members  240 B are formed to the base member  100  by an injection molding. As shown in  FIG. 19 , each of the elastic-base members  240 B is formed in a line in the direction perpendicular to the predetermined direction P. In detail, each of the elastic-base members  240 B has the elastic-support member(s)  220 B and a connection portion  230 B. The elastic-support members  220 B enclose the contact-attachment portions  130  of the base member  100 . The connection portion  230 B connects the elastic-support members  220 B neighboring in the direction perpendicular to the predetermined direction P. The connection portion  230 B of the present embodiment has the same diameter (shape) as the elastic-support member  220 B. 
     After that, the connection portions  230 B are removed from the elastic-base member  240 B. The connection portions  230 B may be removed by a laser-cutting, press process or the like, taken along a cutting line C 1  shown in  FIG. 22 . As a result of the above-processes, the base member  100  which has the elastic-support members  220 B formed to the contact-attachment portions  130  is obtained. Similarly to the first embodiment, the contact-attachment portion is entirely embedded in the elastic-support member  220 B so that the elastic-support member  220  is positioned with accuracy in the X direction and in the Y direction. Accordingly the elastic-support member  220  is securely held by the base member  100 . The elastic-support members  220 B of the present embodiment are obtained by removing the connection portion  230 B from the elastic-base member  240 B (see  FIG. 22 ). However, the elastic-support members  220 B may be directly formed to the corresponding contact-attachment portions  130 . 
     Fourth Embodiment 
     The fourth embodiment of the present invention is related to a variation example of the frame  300  of the connector  10 . As shown in  FIG. 24  to  FIG. 27 , a connector  10 A comprises a frame  300 A. The base member  100  and the contact  200  of the first embodiment of can be used for the connector  10 A of the present embodiment, thus, the same numerals are given to those components, thus, explanations of the structures and the manufacturing methods of these components will be omitted. 
     The frame  300 A has a receiving portion  350  (see  FIG. 24 ) formed on the upper surface  303  and a receiving portion  340 A (see  FIG. 25 ) formed on the under surface  305 . The receiving portion  350  receives an LGA package  1000  while the receiving portion  350 A receives the connector  10 A. As shown in  FIG. 26 , the LGA package  1000  is received in the receiving portion  350  so that pads  1010  of the LGA package  1000  is adjusted, in position, to the contacts  200 . In this state, when the underside of the board  950  and the upper side of the LGA package  1000  are pressed, the contacts  200  are deformed so that the sufficient contact pressure can be obtained by restoring force. As a result, the pads  960  are electrically connected with the corresponding pads  1010  through the contacts  200 . 
     The present application is based on a Japanese patent application of JP2012-143353 filed before the Japan Patent Office on Jun. 26, 2012, the contents of which are incorporated herein by reference. 
     While there has been described what is believed to be the preferred embodiment of the invention, those skilled in the art will recognize that other and further modifications may be made thereto without departing from the spirit of the invention, and it is intended to claim all such embodiments that fall within the true scope of the invention.