Abstract:
A head gimbal assembly, which is a component of a hard disk drive, has a bending portion that has elasticity and is bent at a predetermined angle under an unloaded condition, and a slider is bonded to a holding portion thereof by mounting the head gimbal assembly on a bonding jig in a state in which the bending portion is stretched. When the head gimbal assembly is separated from the bonding jig after bonding, the bending portion is not restored freely, so that the head gimbal assembly is caught by the bonding jig during the separating process and a locked state is sometimes established.

Description:
BACKGROUND OF THE INVENTION 
   1. Technical Field 
   The present invention relates to a construction of a bonding jig used in a process for manufacturing a head gimbal assembly (hereinafter referred to as an HG assembly), which is a component of a hard disk drive, and a method for separating the HG assembly from the bonding jig. 
   2. Description of the Related Art 
     FIG. 7  shows a construction of an essential part of a general HG assembly.  FIG. 7A  is a top plan view thereof,  FIG. 7B  is a front view thereof, and  FIG. 7C  is a perspective view of a tip end portion of the HG assembly. 
   As shown in these figures, an HG assembly  51  is made up of a load beam  52 , a flexure  53 , a slider  54 , and mount plates  55 . The mount plates  55  are formed along the upper and lower surfaces of a mounting portion  52   a  of the load beam  52 , in which an attachment hole  56  for attaching the HG assembly  51  is formed, so as to hold the mounting portion  52   a  therebetween to reinforce the mounting portion  52   a  of the load beam  52 . 
   In  FIG. 7 , the shape and dimension proportion of each element such as the slider  54  of the HG assembly  51  are shown by changing them from the actual ones for ease of understanding. A load portion  52   b  in a tapered shape of the load beam  52  has folded portions  52   c  and  52   d  formed by bending both edge portions of the load portion  52   b  at right angles, by which the rigidity of the load portion  52   b  is kept. A hinge portion  52   e , at which the folded portions are not formed, is formed with an opening  52   f  to provide elasticity, and is bent at a predetermined bending angle α with a portion  52   i  indicated by the indicating line A passing through the opening  52   f  being a boundary. This bend is caused by plastic deformation, so that this angle α is kept in an unloaded state. However,  FIG. 7A  shows a state in which the hinge portion  52   e  is not bent to simplify the explanation. 
   The flexure  53  is configured so that a bonding portion  53   a  indicated by the hatching in  FIG. 7A  is bonded and fixed to the lower surface of the load beam  52 , and an arch-shaped notch  53   b  is formed in the range from an unfixed intermediate portion to a tip end portion. A flexure tongue  53   c  formed by the arch-shaped notch  53   b  is formed with a pivot  53   d  projecting upward. At a stage at which the flexure  53  is fixed to the load beam  52 , the tip end portion of the pivot  53   d  comes into contact with the lower part of the load beam  52  at one point, and other portions of the flexure  53  keep a state in which they are slightly separated from the load beam  52 . 
   On the other hand, a pair of flexure arms  53   f  and  53   g , which are formed by the arch-shaped notch  53   b  and are elongated in the lengthwise direction, act as springs at this time. Specifically, the flexure arms  53   f  and  53   g  are curved slightly so that the tip end portion of the pivot  53   d  is pressed on the lower part of the load beam  52  in order to keep this state. Therefore, the flexure tongue  53   c  is slightly turnable in all directions around the contact point of the pivot  53   d  while having a restoring force. 
   Also, the HG assembly  51  has an alignment hole  57  formed in the fixing portion  53   a  so that the center thereof is located on the centerline B connecting the center of the pivot  53   d  and the center of the attachment hole  56 . To a bonding face on the lower surface of the flexure tongue  53   c  is bonded a bonding portion on an upper surface  54   a  of the slider  54  with a predetermined adhesive or the like as described below. Therefore, the aforementioned flexure arms  53   f  and  53   g , the flexure tongue  53   c , and the pivot  53   d  constitute a suspension portion of the HG assembly  51  for suspending the slider  54 . 
     FIG. 8A  is a top plan view of an essential part in the case where the flexure tongue  53   c  and the rectangular parallelepiped slider  54  are mounted to a bonding jig  61  to bond and fix these two elements to each other.  FIG. 8B  is a sectional view of the essential part, in which a cross section including the reference line C passing through the centers of an alignment pin  62  and an action pin  63  standing on an upper surface  70  of the bonding jig  61  is viewed in the direction of the arrow mark X. 
   When the slider  54  is bonded to the flexure tongue  53   c , the slider  54  with a predetermined orientation is mounted on a slider mount  66 . The configuration is such that a fixing lever  65  lies at the position indicated by the dotted line at this time not to hinder the work. At a stage at which the slider  54  has been mounted, the fixing lever  65  is moved in the direction of the arrow mark X and presses the slider  54  with a predetermined urging force to hold the slider  54  between the fixing lever  65  and an opposite side wall portion  67 . Thereby, the slider  54  is held at a slider mounting portion formed by the slider mount  66 , the side wall portion  67 , and the fixing lever  65 . The configuration is such that the upper surface  54   a  and a tip end surface  54   c  of the slider project from each of adjacent parallel surfaces of the bonding jig  61  through a predetermined width at this time. 
   On the other hand, when the HG assembly  51  to which the slider  54  has not been bonded is mounted to the bonding jig  61 , the HG assembly  51  is mounted so that the alignment pin  62  of the bonding jig  61  is inserted in the alignment hole  57  in the HG assembly  51 , and the action pin  63  of the bonding jig  61  is inserted in the attachment hole  56  in the HG assembly  51 . The configuration is such that a clamper  64  is moved to a position at which the mounting operation is not hindered by a not illustrated means at this time. 
   Also, in the HG assembly  51 , the center distance w 1  between the alignment pin  62  and the action pin  63  standing on the bonding jig  61  is set so as to be substantially equal to the center distance between the alignment hole  57  and the attachment hole  56  in a state in which the bend at the angle α is stretched straight as shown in FIG.  7 A. Therefore, at a stage at which the HG assembly  51  is mounted on the bonding jig  61 , the HG assembly  51  is in a state of being stretched as shown in FIG.  8 . In this state, the clamper  64  is moved to the position shown in  FIG. 8 , and the mount plate  55  of the HG assembly  51  is pressed on and fixed to the upper surface  70  of the bonding jig  61  with a predetermined pressing force. 
   Thereby, the upper surface  54   a  of the slider  54  and the lower surface of the flexure tongue  53   c  keep a state of being pressed on each other with a predetermined pressure. Therefore, an adhesive with low elasticity such as an epoxy adhesive is applied to either one bonding surface before these elements are joined, and this bonding state is kept during a subsequent predetermined drying process, by which these two elements can be bonded firmly or in a temporarily fixed state. 
   After the slider  54  is bonded to the flexure tongue  53   c  as described above, the HG assembly  51  is separated from the bonding jig  61 . For this purpose, the fixing lever  65  pressing the slider  54  is moved again to the position indicated by the dotted line, and the clamper  64  is moved from the state shown in  FIG. 8 , that is, the state of pressing the mount plate  55  of the HG assembly  51 , thereby releasing the HG assembly  51  from the pressed state. At this time, the HG assembly  51  tends to be restored to the state in which the bending angle β ( FIGS. 9   a  and  9   b ) at the bending portion  52   i  becomes the aforementioned predetermined angle α. 
   Therefore, the engagement position of the alignment hole  57  in the HG assembly  51  and the alignment pin  62  fitting in the alignment hole  57  moves upward, and also the slider  54  tends to be inclined in the direction of the arrow mark W with two contact portions being the support lines. The two contact portions are a contact portion at which the lower surface of the slider  54  comes into contact with a corner  68  of the slider mount  66  and a contact portion at which a lower surface corner  54   b  of the slider  54  comes into contact with a slider mounting portion side wall  69  of the bonding jig  61 . 
   However, the HG assembly  51  cannot move in the direction of the arrow mark Y due to the engagement of the alignment pin  62  with the alignment hole  57  in the HG assembly  51 . Although the engagement position moves upward to some extent along with the deformation of the flexure arms  53   f  and  53   g , the inclination of the slider  54  in the direction of the arrow mark W does not proceed due to the friction on the contact portions. 
   As described above, when the HG assembly  51  is separated from the bonding jig  61 , the HG assembly  51  is caught by the bonding jig  61  during the separating process and a locked state is sometimes established. If an attempt is made to forcedly separate the HG assembly  51  from the bonding jig to release the HG assembly  51  from this state, there arises a problem in that the flexure is deformed plastically or the bonding portion of the slider is peeled off. 
   SUMMARY OF THE INVENTION 
   In a method for separating a head gimbal assembly from a bonding jig, the head gimbal assembly having a bending portion that has elasticity and is bent at a predetermined angle under an unloaded condition, a suspension portion for suspending a slider and an alignment hole for aligning the head gimbal assembly with the bonding jig, which are disposed on one side of the bending portion, and an opening for attachment disposed on the other side of the bending portion, and the method being used to separate the head gimbal assembly from the bonding jig after the slider is bonded to the suspension portion of the head gimbal assembly with the bonding jig. 
   The slider is held on a slider mounting portion of the bonding jig; an alignment pin is inserted into the alignment hole and a movable pin is inserted into the opening, the alignment pin having a shape of being relatively movable in a predetermined direction through a predetermined width in a state of being inserted in the alignment hole and standing on the bonding jig, and the movable pin being set on the bonding jig; the movable pin is moved in a direction of being separated from the alignment pin to position a portion of the suspension portion at which the slider is to be bonded in a state in which the bend of the bending portion is stretched, and the head gimbal assembly is pressed and fixed on the bonding jig with a clamper to keep the stretched state; and the head gimbal assembly is released from the fixed state having been established by the clamper in a state in which the movable pin is caused to move or to be movable in a direction of coming close to the alignment pin after executing a bonding step and releasing the slider from the held state. 
   Also, the bonding jig includes a slider mounting portion for mounting and holding the slider thereon; an alignment pin having a shape of being relatively movable in a predetermined direction through a predetermined width in a state of being inserted in the alignment hole and standing on the bonding jig; a movable pin movably held so that a distance between the movable pin and the alignment pin is variable; and a clamper for pressing and fixing the head gimbal assembly on the bonding jig in a state in which the head gimbal assembly is mounted on the bonding jig so that the alignment pin and the movable pin are inserted in the alignment hole and the opening, respectively, and in a state in which a portion of the suspension portion contacting with the slider is positioned with the movable pin moving in a direction of separating from the alignment pin and with the bend of the bending portion is stretched. 
   Also, in another embodiment, a bonding jig for bonding a slider to a suspension portion of a head gimbal assembly, the head gimbal assembly having a bending portion that has elasticity and is bent at a predetermined angle under an unloaded condition, the suspension portion for suspending the slider and an alignment hole for aligning the head gimbal assembly with the bonding jig, which are disposed on one side of the bending portion, and an opening for attachment disposed on the other side of the bending portion, includes a slider mounting portion for mounting and holding the slider thereon; an alignment pin standing on the bonding jig to be inserted in the alignment hole; an action pin standing at a position such that a distance between the action pin and the alignment pin is substantially equal to a distance between the alignment hole and the opening in a state in which the bend of the bending portion is stretched; and a clamper for pressing and fixing the head gimbal assembly on the bonding jig at a stage at which the head gimbal assembly is mounted on the bonding jig so that the alignment pin and the action pin are inserted in the alignment hole and the opening, respectively, and is configured so that when a relative position of the alignment pin with respect to the alignment hole or a relative position of the action pin with respect to the opening is changed a predetermined amount from the state in which said head gimbal assembly is pressed with the clamper, the alignment pin is disengaged from the alignment hole and the action pin is disengaged from the opening. 
   Also, when a tab extending on an extension line connecting the opening and the alignment hole is formed at an end on the one side of the head gimbal assembly, the bonding jig may be provided with a tab support having a contact portion with which a tip end portion of the tab comes into contact in a process in which the head gimbal assembly is released from the fixed state established by the clamper so that the bend of the bending portion of the head gimbal assembly is restored. 
   Further, in the bonding jig of another embodiment described above, the configuration may be such that the action pin is a prismatic portion standing on an upper surface of the bonding jig and a pyramidal portion formed continuously with the prismatic portion, the alignment pin is a columnar portion standing on the upper surface of the bonding jig and a conical portion formed continuously with the columnar portion, and a taper is formed at a portion of the opening facing the bonding jig. 
   Thus, an object of the present invention is to provide a bonding jig by which a separating operation can be performed smoothly without posing the above problem when an HG assembly having been bonded is separated from the bonding jig for bonding a slider to a flexure tongue of the HG assembly, and a method for separating the HG assembly from the bonding jig. 

   
     BRIEF DESCRIPTION OF THE DRAWINGS 
       FIG. 1A  is a top plan view of an essential part in the case where an HG assembly  10  is mounted on a bonding jig  1  of Embodiment 1 in accordance with the present invention, and  FIG. 1B  is a sectional view of the essential part, in which a cross section including the reference line D is viewed in the direction of the arrow mark X; 
       FIG. 2A  is an explanatory view showing a status of the HG assembly when the hold of a clamper  64  is released, and  FIG. 2B  is an explanatory view for illustrating the movement of a slider  54  shown in  FIG. 2A ; 
       FIG. 3A  is a top plan view of an essential part in the case where an HG assembly  13  is mounted on a bonding jig  5  of Embodiment 2 in accordance with the present invention, and  FIG. 3B  is a sectional view of the essential part, in which a cross section including the reference line E is viewed in the direction of the arrow mark X; 
       FIG. 4A  is a sectional view of a portion in the vicinity of a notch action pin  7 , in which a cross section including the reference line F shown in  FIG. 3A  is viewed in the direction of the arrow mark Y, and  FIG. 4B  is a sectional view of a portion in the vicinity of a notch alignment pin  6 , in which a cross section including the reference line G shown in  FIG. 3A  is viewed in the direction of the arrow mark Y; 
       FIG. 5A  is a top plan view of an essential part in the case where an HG assembly  16  is mounted on a bonding jig  8  of Embodiment 3 in accordance with the present invention, and  FIG. 5B  is a sectional view of the essential part, in which a cross section including the reference line D is viewed in the direction of the arrow mark X; 
       FIG. 6  is an explanatory view showing other examples of the shape of the alignment hole  11  in the HG assembly of Embodiment 1; 
       FIG. 7  is a configuration view of an essential part of a general HG assembly,  FIG. 7A  being a top plan view,  FIG. 7B  being a front view, and  FIG. 7C  being a perspective view of a tip end portion thereof; 
       FIG. 8A  is a top plan view of an essential part in the case where a flexure tongue  53   c  and a slider  54  are mounted on a bonding jig  61  to bond and fix the slider  54  to the flexure tongue  53   c , and  FIG. 8B  is a sectional view of the essential part, in which a cross section including the reference line C passing through the centers of an alignment pin  62  and an action pin  63  is viewed in the direction of the arrow mark X; and 
       FIG. 9A  is an explanatory view showing a status of an HG assembly when the hold of a clamper  64  is released, and  FIG. 9B  is a partially enlarged view of a portion in the vicinity of the slider  54  shown in FIG.  9 A. 
   

   DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
   Embodiment 1 
     FIG. 1A  is a top plan view of an essential part in the case where a flexure tongue  53   c  and a slider  54  of an HG assembly  10  are mounted on a bonding jig  1  in accordance with Embodiment 1 of the present invention to bond and fix the slider  54  to the flexure tongue  53   c .  FIG. 1B  is a sectional view of the essential part, in which a cross section including the reference line D passing through the center of an alignment pin  2 , which stands on an upper surface  70  of the bonding jig  1 , and the movement axis of a movable pin  3  is viewed in the direction of the arrow mark X. 
   This HG assembly  10  differs from the aforementioned HG assembly  51  shown in  FIG. 7  in that an elongated alignment hole  11  is formed on the centerline B of the HG assembly  10  in place of the circular alignment hole  57 . Other configuration of the HG assembly  10  is exactly the same as that of the HG assembly  51 , so that the same reference numerals are applied to the same elements as those of the HG assembly  51 , and the duplicated explanation is omitted. 
   Also, the boning jig  1  differs from the aforementioned bonding jig  61  shown in  FIG. 8  in that the movable pin  3  is disposed in place of the action pin  63 , and it has a shape of being relatively movable in the lengthwise direction of the elongated hole through a predetermined width in a state in which the alignment pin  2  is inserted in the alignment hole  11 . Other configuration of the bonding jig  1  is exactly the same as that of the bonding jig  61 , so that the same reference numerals are applied to the same elements as those of the bonding jig  61 , and only the different portions are explained with emphasis thereon. 
   When the slider  54  is bonded to the flexure tongue  53   c , the slider  54  with a predetermined orientation is first mounted on a slider mount  66 . The configuration is such that a fixing lever  65  lies at the position indicated by the dotted line at this time not to hinder the work. At a stage at which the slider  54  has been mounted, the fixing lever  65  is moved in the direction of the arrow mark X and presses the slider  54  with a predetermined urging force to hold the slider  54  between the fixing lever  65  and an opposite side wall portion  67 . Thereby, the slider  54  is held at a slider mounting portion. 
   On the other hand, when the HG assembly  10  to which the slider  54  has not been bonded is mounted to the bonding jig  1 , the HG assembly  10  is mounted so that the alignment pin  2  of the bonding jig  1  is inserted in the alignment hole  11  in the HG assembly  10 , and the movable pin  3  of the bonding jig  1  is inserted in an attachment hole  56  in the HG assembly  10 . 
   The configuration is such that a clamper  64  is moved to a position at which the mounting operation is not hindered by a not illustrated means at this time of mounting. Also, at this time of mounting, the movable pin  3  preferably lies at the initial position (for example, the position indicated by the dotted line) at which both the pins  2  and  3  can be inserted smoothly. 
   Next, the movable pin  3  is moved in the direction of the arrow mark YY, and the alignment pin  2  is brought into contact with an arcuate portion of the alignment hole  11  while the bend of the HG assembly  10  is stretched. Thereby, the HG assembly  10  is positioned so that the centerline B of the HG assembly  10  agrees with the reference line D of the bonding jig  1 . Simultaneously with or subsequently to this positioning work, the clamper  64  is moved to the position shown in the figures of  FIG. 1  to press a mount plate  55  of the HG assembly  10  on the upper surface  70  of the bonding jig  1  with a predetermined pressing force and fix the mount plate  55  onto the bonding jig  1 . 
   Thereby, an upper surface  54   a  of the slider  54  and a lower surface of the flexure tongue  53   c  keep a state of being pressed on each other with a predetermined pressure. Therefore, an adhesive with low elasticity such as an epoxy adhesive is applied to either one bonding surface before these elements are joined, and this bonding state is kept during a subsequent predetermined drying process, by which these two elements can be bonded firmly or in a temporarily fixed state. 
   After the slider  54  is bonded to the flexure tongue  53   c  as described above, the HG assembly  10  is separated from the bonding jig  1 . For this purpose, the fixing lever  65  pressing the slider  54  is moved again to the position indicated by the dotted line, and further the movable pin  3  is made in a free state, that is, a state of being movable freely in the direction of the arrow mark Y. In order to release the HG assembly  10  from the state shown in  FIG. 1 , in which the clamper  64  presses the mount plate  55  of the HG assembly  10 , the clamper  64  is moved from that position. At this time, the HG assembly  10  tends to be restored to a state in which the bending angle β at a bending portion  52   i  becomes the aforementioned predetermined angle α as shown in FIG.  2 A. 
   At this time, the engagement position of the alignment hole  11  in the HG assembly  10  and the alignment pin  2  fitting in the alignment hole  11  moves upward, and also the slider  54  tends to be inclined in the direction of the arrow mark W with two contact portions being the support lines. The two contact portions are a contact portion at which the lower surface of the slider  54  comes into contact with a corner  68  of the slider mount  66  and a contact portion at which a lower surface corner  54   b  of the slider  54  comes into contact with a slider mounting portion side wall  69  of the bonding jig  1 .  FIG. 2B  is a view showing the movement path of the slider at this time. As shown in  FIG. 2B , a middle point  54   d  of the upper surface  54   a  of the slider  54  moves in both directions of the arrow marks Y and Z along with the inclination of the slider  54 . 
   Therefore, along with the inclination of the slider  54 , the alignment hole  11  of the HG assembly  10  moves in the direction of the arrow mark Y while inclining with respect to the alignment pin  2 , and the attachment hole  56  also moves in the direction of the arrow mark Y while inclining with respect to the movable pin  3 . Such relative movement is allowed by the configuration in which the movement relative to the alignment pin  2  is free because the alignment hole  11  is an elongated hole, and a state in which the movable pin  3  passes through the attachment hole  56  with a play can be kept because the movable pin  3  can move freely. Therefore, the bending angle β at a hinge portion  52   e  of the HG assembly  10  is restored to the aforementioned predetermined angle α without being hindered, so that the HG assembly  10  in this restored natural state can be separated from the bonding jig  1 . 
     FIGS. 6A and 6B  show other examples of the shape of the alignment hole  11  in the HG assembly  10 . As shown in  FIG. 6A , an alignment hole  21  may have a portion of contact with the alignment pin  2  formed into a wedge shape, or as shown in  FIG. 6B , an alignment hole  22  may be in the shape of a tapered elongated hole. For both of these holes, by pulling a load beam  52  in the direction of the arrow mark YY, as in the case of the aforementioned elongated hole  11 , the HG assembly  10  can be positioned with respect to the alignment pin  2 . 
   As described above, according to the bonding jig and the method for separating the HG assembly from the bonding jig in accordance with Embodiment 1, when the HG assembly is separated from the bonding jig, the stretched HG assembly can be restored to the original bent state without restriction. Therefore, the HG assembly can be separated from the bonding jig without damage to the HG assembly. 
   Embodiment 2 
     FIG. 3A  is a top plan view of an essential part in the case where the flexure tongue  53   c  and the slider  54  of an HG assembly  13  are mounted on a bonding jig  5  in accordance with Embodiment 2 of the present invention to bond and fix the slider  54  to the flexure tongue  53   c .  FIG. 3B  is a sectional view of the essential part, in which a cross section including the reference line E passing through the center of a notch alignment pin  6 , which stands on the upper surface  70  of the bonding jig  5 , and a notch action pin  7  is viewed in the direction of the arrow mark X. However, the sectional view of the essential part of  FIG. 3B  shows a state in a process in which the HG assembly  13  is separated from the boding jig  5  as described later. 
   Also, this HG assembly  13  differs from the aforementioned HG assembly  51  shown in  FIG. 7  in that a taper  14   a  is formed at the lower end part of the attachment hole  56  in a mount plate  14 . Other configuration of the HG assembly  13  is exactly the same as that of the HG assembly  51 , so that the same reference numerals are applied to the same elements as those of the HG assembly  51 , and the duplicated explanation is omitted. Further, the boning jig  5  differs from the aforementioned bonding jig  61  shown in  FIG. 8  in the shapes of the notch alignment pin  6  used in place of the alignment pin  62  and the notch action pin  7  used in place of the action pin  63 . Other configuration of the bonding jig  5  is exactly the same as that of the bonding jig  61 , so that the same reference numerals are applied to the same elements as those of the bonding jig  61 , and only the different portions are explained with emphasis thereon. 
     FIG. 4A  is a sectional view of a portion in the vicinity of the notch action pin  7 , in which a cross section including the reference line F that passes through the center of the notch action pin  7  shown in FIG.  3 A and is perpendicular to the reference line E is viewed in the direction of the arrow mark Y. Also,  FIG. 4B  is a sectional view of a portion in the vicinity of the notch alignment pin  6 , in which a cross section including the reference line G that passes through the center of the notch alignment pin  6  shown in FIG.  3 A and is perpendicular to the reference line E is viewed in the direction of the arrow mark Y. 
   As shown in  FIGS. 3A and 4A , the notch action pin  7  is formed of a prismatic portion  7   c  standing on the upper surface  70  of the bonding jig  5  and a pyramidal portion  7   d  formed continuously with the prismatic portion  7   c . The cross section of the prismatic portion  7   c  is in the shape of a rhombus, and the length of a diagonal line between ends  7   a  and  7   b  in the direction of the reference line F ( FIG. 3A ) is set slightly shorter than the inside diameter of the attachment hole  56  in the HG assembly  13 . Also, as shown in  FIG. 4A , the height h 1  of a regulation portion of the prismatic portion  7   c  is set higher than the depth d of the taper  14   a  formed at the lower end part of the attachment hole  56  in the mount base  14  by a predetermined regulation portion remaining height Dh 1  as described later. 
   On the other hand, as shown in  FIG. 4B , the notch alignment pin  6  is formed of a columnar portion  6   a  standing on the upper surface  70  of the bonding jig  5  and a conical portion  6   b  formed continuously with the columnar portion  6   a . The height h 2  of a regulation portion of the columnar portion  6   a  is set higher than the height from the upper surface  70  of the bonding jig  5  around the alignment hole  57  when the HG assembly  13  is mounted on the bonding jig  5  in a state in which the bending portion  52   i  of the HG assembly  13  stretches by a predetermined regulation portion remaining height Dh 2  as described later. 
   In the above-described configuration, when the slider  54  is bonded to the flexure tongue  53   c , as explained in Embodiment 1, the slider  54  is positioned at the slider mounting portion and is held. When the HG assembly  13  to which the slider  54  has not been bonded is mounted to the bonding jig  5 , the HG assembly  13  is mounted so that the notch alignment pin  6  of the bonding jig  5  is inserted in the alignment hole  57  in the HG assembly  13  and the notch action pin  7  of the bonding jig  5  is inserted in the attachment hole  56  in the HG assembly  13 . The configuration is such that the clamper  64  is moved to the position at which the mounting operation is not hindered by a not illustrated means at this time of mounting. 
   Also, in the HG assembly  13 , the distance w 1  between the notch alignment pin  6  and the notch action pin  7  provided on the bonding jig  5  is set at a distance between these pins in the state in which the bend of the bending portion  52   i  ( FIG. 7B ) at the angle α is stretched straight as shown in the example of the HG assembly  51  in FIG.  7 A. Therefore, at the stage at which the HG assembly  13  is mounted on the bonding jig  5 , the HG assembly  13  is in a stretched state as shown in FIG.  3 A. In this state, the clamper  64  is moved to the position shown in  FIG. 3A , and presses the mount plate  14  of the HG assembly  13  on the upper surface  70  of the bonding jig with the predetermined pressing force to fix the HG assembly  13 . 
   Thereby, the state in which the upper surface  54   a  of the slider  54  and the lower surface of the flexure tongue  53   c  are pressed on each other with the predetermined pressure is kept. Therefore, an adhesive with low elasticity such as an epoxy adhesive is applied to either one bonding surface before these elements are joined, and this bonding state is kept during the subsequent predetermined drying process, by which these two elements can be bonded firmly or in a temporarily fixed state. 
   After the slider  54  is fixed to the flexure tongue  53   c  as described above, the HG assembly  13  is separated from the bonding jig  5 . For this purpose, the fixing lever  65  pressing the slider  54  is moved to the position indicated by the dotted line, and the clamper  64  is moved from the position of the state shown in  FIG. 3A , that is, the state of pressing the mount plate  14  of the HG assembly  13  to release the HG assembly from the pressed state. At this time, the HG assembly  13  tends to be restored to the state in which the bending angle β at a bending portion  52   i  becomes the aforementioned predetermined angle α 0  as shown in FIG.  3 B. 
   At this time, the engagement position of the alignment hole  57  in the HG assembly  13  and the notch alignment pin  6  fitting in the alignment hole  57  moves upward, and also the slider  54  tends to be inclined in the direction of the arrow mark W with two contact portions being the support lines. The two contact portions are a contact portion at which the lower surface of the slider  54  comes into contact with the corner  68  of the slider mount  66  and a contact portion at which the lower surface corner  54   b  of the slider  54  comes into contact with the slider mounting portion side wall  69  of the bonding jig  5 . 
   By a slight (however, not less than Dh 2 ) upward movement of the engagement position of the alignment hole  57  in the HG assembly  13  and the notch alignment pin  6  at this time, the engagement relationship between these elements is broken off, and the portion of the alignment hole  57  in the HG assembly  13  becomes in a free state. On the other hand, the engagement portions of the mount plate  14  with the ends  7   a  and  7   b  of the notch action pin  7  move upward through a distance of not less than Dh 1  due to a slight inclination at this time (in the direction opposite to the arrow mark W) (FIG.  4 A), so that the upper end of the taper  14   a  comes at a height not lower than h 1 , by which the engagement state is left, and this portion also becomes in a free state. Therefore, the bending angle β at the bending portion  52   i  of the HG assembly  13  is restored to the aforementioned predetermined angle α without being hindered, so that the HG assembly  13  in this restored natural state can be separated from the bonding jig  5 . 
   As described above, according to the bonding jig  5  of Embodiment 2, the heights h 1  and h 2  of the regulation portions of the notch action pin  7  and the notch alignment pin  6  are set such that the regulation portion remaining heights Dh 1  and Dh 2  can have proper values, that is, values such that these pins can be disengaged by a slight inclination or displacement of the portions of the HG assembly due to the restoration of the bending portion  52   i  of the HG assembly  13 . Thereby, when the HG assembly  13  is separated from the bonding jig  5 , the stretched HG assembly can be restored to the original bent state without restriction. Therefore, the HG assembly can be separated from the bonding jig without damage to the HG assembly. 
   Embodiment 3 
     FIG. 5A  is a top plan view of an essential part in the case where the flexure tongue  53   c  and the slider  54  of an HG assembly  16  are mounted on a bonding jig  8  in accordance with Embodiment 3 of the present invention to bond and fix the slider  54  to the flexure tongue  53   c .  FIG. 5B  is a sectional view of the essential part, in which a cross section including the reference line D passing through the center of a notch alignment pin  62 , which stands on the upper surface  70  of the bonding jig  8 , and the movement axis of the movable pin  3  is viewed in the direction of the arrow mark X. However, the sectional view of the essential part of  FIG. 5B  shows a state in a process in which the HG assembly  16  is separated from the boding jig  8  as described later. 
   Also, this HG assembly  16  differs from the HG assembly  10  of Embodiment 1 shown in  FIG. 1A  in that a tab  52   g  is provided at the tip end of the load beam  52 . Other configuration of the HG assembly  16  is exactly the same as that of the HG assembly  10 , so that the same reference numerals are applied to the same elements as those of the HG assembly  10 , and the duplicated explanation is omitted. Further, the bonding jig  8  differs from the bonding jig  1  of Embodiment 1 shown in  FIG. 1  in that a tab support  9  is additionally provided. Other configuration of the bonding jig  8  is exactly the same as that of the bonding jig  1 , so that the same reference numerals are applied to the same elements as those of the bonding jig  1 , and only the different portions are explained with emphasis thereon. 
   In the above-described configuration, the slider  54  is bonded to the flexure tongue  53   c  in the same way as in the case of the above-described Embodiment 1, so that the detailed explanation thereof is omitted.  FIG. 5A  shows a state in which after the aforementioned predetermined bonding process is finished, the clamper  64  presses the mount plate  55  of the HG assembly  16  on the upper surface  70  of the bonding jig  8  with the predetermined pressing force as shown in the figure to fix the HG assembly  16  to the bonding jig  8 . 
   When the HG assembly  16  in a state in which the flexure tongue  53   c  thereof is bonded to the slider  54  is separated from the bonding jig  8 , the fixing lever  65  pressing the slider  54  is moved to the position indicated by the dotted line, and the clamper  64  is moved from the position shown in  FIG. 5A  to leave the pressing state. 
   At this time, the HG assembly  16  tends to be restored to the state in which the bending angle β at a bending portion  52   i  becomes the aforementioned predetermined angle α as shown in FIG.  5 B. Therefore, the engagement position of the elongated alignment hole  11  in the HG assembly  16  and the alignment pin  62  fitting in the alignment hole  11  moves upward, and also the slider  54  tends to be inclined in the direction of the arrow mark W with two contact portions being the support lines. The two contact portions are a contact portion at which the lower surface of the slider  54  cornes into contact with the corner  68  of the slider mount  66  and a contact portion at which the lower surface corner  54   b  of the slider  54  comes into contact with the slider mounting portion side wall  69  of the bonding jig  8 . 
   Along with this inclination, the alignment hole  11  in the HG assembly  16  moves in the direction of the arrow mark Y while inclining with respect to the alignment pin  62 , and the attachment hole  56  also moves in the direction of the arrow mark Y while inclining with respect to the movable pin  3 . Such relative movement is allowed by the configuration in which the movement relative to the alignment pin  62  is free because the alignment hole  11  is an elongated hole, and the state in which the movable pin  3  passes through the attachment hole  56  with a play can be kept because the movable pin  3  can move freely. Along with the inclination of the slider  54 , a tip end portion  52   h  of the tab  52   g  provided at the tip end of the load beam  52  comes into contact with an upper surface  9   a  of the tab support  9 . After that, the HG assembly  16  inclines with this contact point being a fulcrum, so that the slider  54  inclines in the direction of the arrow mark W and also moves in the direction of the arrow mark V. Therefore, a state in which the slider  54  is separated from the slider mount  66  of the bonding jig  8  is established. 
   As described above, according to the bonding jig  8  of Embodiment 3, when the HG assembly  16  having the tab  52   g  at the tip end thereof is separated from the bonding jig  8 , not only the stretched HG assembly can be restored to the original bent state without restriction, but also a state in which the slider  54  is separated from the slider mounting portion of the bonding jig  8  is established. Therefore, as compared with Embodiment 1 in which the slider is in contact with the slider mounting portion at this time, the safety and work efficiency of the slider can further be increased when the HG assembly  16  is separated from the bonding jig  8 . 
   The notch action pin  7 , which is the action pin of the above-described Embodiment 2, has a shape of a combination of a prism and a pyramid. However, the shape of the action pin is not limited to this, and the action pin may be formed of a prismatic portion only or may have a shape of a combination of an elliptic column and an elliptic cone. 
   Further, the bonding jig  8  of the above-described Embodiment 3 is configured so that the tab support  9  is added to the bonding jig  1  of Embodiment 1. However, the configuration is not limited to this, and may be such that the tab support  9  is added to the bonding jig  5  of Embodiment 2. Further, the upper surface  9   a  of the tab support  9  in the above-described Embodiment 3 may be subjected to anti-slipping treatment or may be inclined to make the contacting tab less liable to slip. 
   Still further, the alignment pin  2  of the above-described Embodiment 1 has a circular shape in cross section. However, the shape of the alignment pin  2  is not limited to this, and the cross section thereof may have an elliptic or semicircular shape to further increase the width of relative movement with respect to the alignment hole, or other various modifications can be made. 
   Also, terms “upper” and “lower” have been used in the explanation of the above-described embodiments. However, these terms have been used for convenience only, and do not restrict the positional relationship in the state in which the bonding jig is arranged. 
   The present invention has several advantages. According to the separating method defined in claim 1 and the bonding jig defined in claim 2 in accordance with the present invention, when the HG assembly is separated from the bonding jig, the stretched HG assembly is restored to the original bent state without restriction. Therefore, the HG assembly can be separated from the bonding jig without damage to the HG assembly. Also, according to the bonding jig defined in claim 3 or 5 in accordance with the present invention, the same effect as that of the bonding jig defined in claim 2 can be achieved by merely making the shapes of the alignment pin and the action pin predetermined ones. Therefore, a bonding jig that has a simple configuration and is advantageous in terms of cost can be provided. 
   Also, according to the bonding jig defined in claim 4 in accordance with the present invention, for the HG assembly having the tab  52  at the tip end thereof, not only the stretched HG assembly is restored to the original bent state without restriction, but also the slider can be separated from the slider mounting portion of the bonding jig. Therefore, the safety and work efficiency of the slider can further be increased compared with the bonding jig defined in claim 2 when the HG assembly is separated from the bonding jig.