CN102024459B - Cantilever part with short flexible member tail, head gimbal assembly and disk drive unit - Google Patents
Cantilever part with short flexible member tail, head gimbal assembly and disk drive unit Download PDFInfo
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- CN102024459B CN102024459B CN200910178249.0A CN200910178249A CN102024459B CN 102024459 B CN102024459 B CN 102024459B CN 200910178249 A CN200910178249 A CN 200910178249A CN 102024459 B CN102024459 B CN 102024459B
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- magnetic head
- flexible element
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Abstract
The invention discloses a cantilever part for a head gimbal assembly. The cantilever part comprises a flexible part; a plurality of groups of electrical wires and a plurality of adhesive terminals connected with a printed circuit board are arranged on the tail of the flexible member, wherein each adhesive terminal comprises a connecting sheet and a hole formed at one end of the connecting sheet; and the hole is connected with the connecting sheet and the printed circuit board electrically and mechanically through adhesives; the connecting sheet is provided with an adhesive part adjacent to the hole and an exposure part used for testing; the hole includes a central hole and two straight slots connected to the central hole, and the adhesive part of the connecting sheet is arranged between the two straight slots and the exposure part. Simultaneously, the invention also discloses the head gimbal assembly with the cantilever part and a disk drive unit. The cantilever part comprises the flexible member with a short tail, the adhesive terminal on the tail of the flexible member can be used for connection and dynamic performance test, so that the length of the cantilever part can be shortened; therefore, the cost of producing cantilever parts in batches can be reduced.
Description
Technical field
The present invention relates to a kind of information recording disk driver element, relate in particular to a kind of folded assembly in magnetic head, and disc drive unit that there is the cantilever part of short flexible element afterbody and there is this cantilever part.
Background technology
Disc drive unit is a kind of common information storing device.Referring to Figure 1A, traditional disc drive unit 100 consists essentially of a plurality of rotatable disks 111, the Spindle Motor 112 for driving described disk 111 to rotate, the magnetic-head cantilever assembling 116 and the printed circuit board (PCB) 117 being connected with described magnetic-head cantilever assembling 116 around 113 rotations of driving arm axle with the data on reading disk track.Described magnetic-head cantilever assembling 116 comprises at least one actuating arm 114 and a magnetic head fold piece combination 115.
Referring to accompanying drawing 1B, described magnetic head fold piece combination 115 comprises having the magnetic head 121 of read/write inductive head and for carrying or support the cantilever part 190 of this magnetic head 121.As shown in the figure, cantilever part 190 consists of the load beam 123 fitting together, substrate 125, articulated part 124 and flexible element 122.
Fig. 1 C illustrates the detailed structure of flexible element 122.As shown in the figure, on flexible element 122, be formed with the many groups of electrical leads 131 along the length direction of flexible element 122, a plurality of bonding terminal 150 and a plurality of test pieces 135.One end of electrical lead 131 is electrically connected to a prime amplifier (not shown) through this splicing ear 150 and this test pieces 135, and the other end extends to cantilever tongue piece (not shown).Particularly, each bonding terminal 150 comprises brace 132 and is formed on the hole 133 on this brace 132.The shape in this hole 133 is similar to a key.With reference to figure 1B-1C, when connecting this bonding terminal 150 and printed circuit board (PCB) 117 by scolder, scolder flows out when heating from this hole 133, thereby flexible element 122 and printed circuit board (PCB) 117 is bonding.
Due to the shape in hole 133, do not have enough regions to place dynamic performance testing sheet 135 to carry out dynamic performance testing.Thereby, need to increase at the afterbody of flexible element 122 by an additional areas 134 for placing dynamic performance testing sheet 135.And after dynamic performance testing process completes, this additional areas 134 is removed.Because making the length of flexible element 122, this additional areas 134 increases, thus the increase of expense while causing producing cantilever part in batches.
Therefore, urgently a kind of improved cantilever part, magnetic head fold piece combination and disc drive unit, to overcome above-mentioned defect.
Summary of the invention
Fundamental purpose of the present invention is to provide a kind of cantilever part with short flexible element afterbody, the bonding terminal of described flexible element afterbody both can be used for bonding, can be used for again dynamic performance testing, thereby shorten the length of cantilever part, thereby reduce the expense of batch production cantilever part.
Another object of the present invention is to provide a kind of magnetic head fold piece combination, the cantilever part of described magnetic head fold piece combination comprises the flexible element with short-tail portion, and the bonding terminal of described flexible element afterbody both can be used for bonding, can be used for again dynamic performance testing, thereby the length of shortening cantilever part, thereby reduce the expense of producing cantilever part in batches.
A further object of the present invention is to provide a kind of disc drive unit, on the cantilever part of described disc drive unit, comprise the flexible element with short-tail portion, and the bonding terminal of described flexible element afterbody both can be used for bonding, can be used for again dynamic performance testing, thereby the length of shortening cantilever part, thereby reduce the expense of producing cantilever part in batches.
In order to achieve the above object, the invention provides a kind of cantilever part for magnetic head fold piece combination, this cantilever part comprises flexible element, the afterbody of described flexible element is provided with many group electrical leads and a plurality of bonding terminals that are connected with printed circuit board (PCB), wherein, described in each, bonding terminal comprises brace and the hole that is formed on described brace one end, adhesives is passed through electrically and brace and described printed circuit board (PCB) described in mechanical connection in described hole, described brace is provided with the bonding portion adjacent with described hole and the expose portion for testing, described hole comprises a center pit and two grooves that are connected with described center pit, the described bonding portion of described brace is between two described grooves and described expose portion.
In another embodiment of the present invention, described flexible element also comprises stainless steel layer and dielectric layers, and wherein described in one deck, insulation course is formed between described stainless steel layer and another layer of described insulation course, and it is inner that described electrical lead is formed at another layer of described insulation course.Preferably, described insulation course is made by polyimide.
In an embodiment more of the present invention, described flexible element also comprises the overlayer that is formed on described flexible element surface.
The present invention also provides a kind of magnetic head fold piece combination, comprises magnetic head and cantilever part, and described cantilever part has for supporting the flexible element of described magnetic head.Described cantilever part comprises described flexible element, the afterbody of described flexible element is provided with many group electrical leads and a plurality of bonding terminals that are connected with printed circuit board (PCB), wherein, described in each, bonding terminal comprises brace and the hole that is formed on described brace one end, adhesives is passed through electrically and brace and described printed circuit board (PCB) described in mechanical connection in described hole, described brace is provided with the bonding portion adjacent with described hole and the expose portion for testing, described hole comprises a center pit and two grooves that are connected with described center pit, the described bonding portion of described brace is between two described grooves and described expose portion.
The present invention also provides a kind of disc drive unit, this disc drive unit comprises: magnetic head fold piece combination, described magnetic head fold piece combination comprises magnetic head and supports the cantilever part of described magnetic head, a plurality of disk on Spindle Motor, the Spindle Motor, the printed circuit board (PCB) being connected with described magnetic head fold piece combination that drive described disk rotation and actuating arm being connected with described magnetic head fold piece combination of being rotatably installed in.Wherein, described cantilever part comprises flexible element, the afterbody of described flexible element is provided with many group electrical leads and a plurality of bonding terminals that are connected with printed circuit board (PCB), wherein, described in each, bonding terminal comprises brace and the hole that is formed on described brace one end, adhesives is passed through electrically and brace and described printed circuit board (PCB) described in mechanical connection in described hole, described brace is provided with the bonding portion adjacent with described hole and the expose portion for testing, described hole comprises a center pit and two grooves that are connected with described center pit, the described bonding portion of described brace is between two described grooves and described expose portion.
Compared with prior art, because described brace is provided with adjacently with described hole and for bonding portion and the expose portion for test bonding with printed circuit board (PCB), thereby described bonding terminal both can be used for dynamic performance testing, can be used for again bonding.Therefore, do not need described additional areas to place dynamic performance testing sheet, thereby can shorten the length of described cantilever part, and then reduce the expense of batch production cantilever part.
By describing technology contents of the present invention, structural attitude in detail, being reached object and effect, below in conjunction with embodiment and coordinate accompanying drawing to be explained in detail.
Accompanying drawing explanation
Figure 1A is the stereographic map of traditional magnetic disk driver element.
Figure 1B is the stereographic map of traditional magnetic head fold piece combination.
Fig. 1 C is the partial top view of the flexible element of magnetic head fold piece combination shown in Figure 1B.
Fig. 2 is the three-dimensional exploded view of an embodiment of cantilever part of the present invention.
Fig. 3 is the vertical view of the flexible element of cantilever part shown in Fig. 2.
Fig. 4 is the partial enlarged drawing of flexible element afterbody shown in Fig. 3.
Fig. 5 is the sectional view that flexible element is cut open along the Z-Z line of Fig. 4 after welding.
Fig. 6 is the stereographic map of an embodiment of magnetic head fold piece combination of the present invention.
Fig. 7 is the stereographic map of an embodiment of disc drive unit of the present invention.
Embodiment
With reference now to accompanying drawing, describe embodiments of the invention, in accompanying drawing, similarly element numbers represents similar element.As mentioned above, the object of the present invention is to provide a kind of cantilever part of the magnetic head fold piece combination for disc drive unit, this cantilever part comprises flexible element, the afterbody of described flexible element is formed with bonding terminal, described in each, bonding terminal comprises and both can be used for bondingly, can be used for again the brace of dynamic performance testing and is formed at the hole of described brace one end.By described bonding terminal is carried out to new design, described bonding terminal can be used for dynamic performance testing, thereby can shorten the length of cantilever part, and then reduces the expense of batch production cantilever part.
Fig. 2 has shown an embodiment of cantilever part of the present invention.As shown in Figure 2, cantilever part 290 comprises load beam 206, substrate 208, articulated part 207 and the flexible element 205 fitting together.
Referring to Fig. 2 and Fig. 6, described load beam 206 is for being transferred to load force described flexible element 205 and being arranged on the magnetic head 203 on described flexible element 205.Load beam 206 can be made by any material with suitable rigidity, such as stainless steel, so that it has enough hardness to transmit load force to described flexible element 205.Described load beam 206 is connected on substrate 208 by articulated part 207.Load beam 206 is provided with for making the pilot hole 213 of described load beam 206 and 205 alignment of described flexible element.On load beam 206, be formed with a salient point 211, described salient point 211 supports described flexible element 205 in the position at the described magnetic head of correspondence 203 centers.By aiming at described salient point 211 and described flexible element 205, make load force can act on uniformly described magnetic head 203, make described magnetic head 203 work more stable.
Described substrate 208 is for increasing the hardness of whole described cantilever part 290, and it can be by rigid such as stainless steel is made.Described substrate 208 one end are formed with a mounting hole 213, by described mounting hole 213, described cantilever part 290 are installed on the actuating arm of disc drive unit.
In one end of described articulated part 207, be provided with a mounting hole 210, it is corresponding with the described mounting hole 213 on described substrate 208, and in the situation that described mounting hole 210,213 is in alignment with each other, described articulated part 207 is installed on described substrate 208 by part.Thereby described articulated part 207 and described substrate 208 can be by connecting in solder joint 209 place's laser bonding, and described solder joint 209 is distributed on described articulated part 207.In addition, two steps 215 can be integrally formed in the both sides of described articulated part 207 contiguous mounting hole 210 one end, to increase the rigidity of described articulated part 207.In addition, the other end of described articulated part 207 extends two support chips 214, so that described articulated part 207 parts are fixed on described load beam 206.
Described flexible element 205 is made by flexible material, and extends to described load beam 206 from described articulated part 207.Described flexible element 205 has the top 216 of afterbody 238 and the contiguous load beam 206 of contiguous described articulated part 207.One pilot hole 217 is located at 216 places, top of described flexible element 205 and is alignd with the pilot hole 212 on described load beam 206, and the abundant alignment of described pilot hole 217,212 can be guaranteed the assembled with high precision of described flexible element 205 and described load beam 206.216 places, top of described flexible element 205 are provided with a cantilever tongue piece 236 to support described magnetic head 203.
Fig. 3 illustrates the detailed structure of described flexible element 205.As shown in Figure 3 and Figure 5, described magnetic head 203 is arranged on described top 216.Described afterbody 238 is provided with a plurality of bonding terminals 304, for setting up and be electrically connected with printed circuit board (PCB) 505, thereby is connected to control system.On described flexible element 205, be formed with many group electrical leads 302, described electrical lead 302 extends to afterbody 238 from the top 216 of described flexible element 205.
Fig. 4 illustrates the afterbody 238 of described flexible element 205.With reference to figure 4-5, on the afterbody 238 of described flexible element 205, be formed with a plurality of bonding terminals 304, for example, 6.Described bonding terminal 304 is for connecting described printed circuit board (PCB) 505.Particularly, described in each, bonding terminal 304 is comprised of brace 402 and the hole 401 that is formed at described brace 402 one end.By scolder, described hole 401 is for brace 402 and described printed circuit board (PCB) 505 described in electrical and mechanical connection.Described brace 402 comprises the bonding portion 4021 adjacent with described hole 401 and the expose portion 4022 for testing.Preferably, described hole 401 comprises a center pit 4011 and two grooves 4012 that are connected with described center pit 4011.Described groove 4012 is symmetrical about the longitudinal centre line of described flexible element 205.Described bonding portion 4021 is between two described grooves 4012 and the described expose portion 4022 adjacent with described bonding portion 4021.Described brace 402 and correspondingly described electrical lead 302 electric connections, and be electrically connected for the described magnetic head 203 with magnetic head fold piece combination, and then described magnetic head is electrically connected in control system.Preferably, described brace 402 is copper sheet.Quantity that it should be noted that described bonding terminal 304 can change along with actual demand.
Fig. 5 be by scolder and described printed circuit board (PCB) bonding after, the sectional view that described bonding terminal area is cut open along the Z-Z line in Fig. 4.As shown in Figure 5, which floor the described bonding terminal area of described flexible element 205 consist of.From first surface 510 to second surface 520, be respectively the first insulation course 502, the second insulation course 503 and stainless steel layer 501.Described the first insulation course 502 is supported by described the second insulation course 503, and described the second insulation course 503 is supported by described stainless steel layer 501.Described the first insulation course 502 inside are formed with described electrical lead 302 and described bonding terminal 304.When described afterbody 238 is bonding with described printed circuit board (PCB) 505, described scolder 504 flows out by described hole 401, to connect described bonding portion 4021 and described printed circuit board (PCB) 505.Described expose portion 4022 is for the dynamic performance testing of described magnetic head 203.Preferably, described stainless steel layer 501 be also formed with below an air layer 506, for by described stainless steel layer 501 and printed circuit board (PCB) 505 insulation.Refer again to Fig. 4-5, in the present embodiment, described the first insulated window 403 is corresponding to the border of described the first insulation course 502, and described the second insulated window 405 is corresponding to the border of described the second insulation course 503, and described stainless steel window 404 is corresponding to the border of described stainless steel layer 501.Preferably, described the first insulation course 502 and described the second insulation course 503 are made by polyimide.Preferably, described flexible element 205 also comprises the overlayer (not shown) that is formed at described flexible element 205 surfaces.
Continue with reference to figure 4-5, on the one hand, in the assembling process of described magnetic head fold piece combination, described expose portion 4022 can be used for dynamic performance testing.On the other hand, after dynamic performance testing is complete, during heating, the described scolder 504 in the adhesive sheet of described printed circuit board (PCB) 505 flows out from described hole 401, thereby connects described printed circuit board (PCB) 505 and described flexible element 205.That is to say, by described hole 401, described bonding terminal 304 both can be used as adhesive sheet, for connecting described flexible element 205 and described printed circuit board (PCB) 505, can be used as again the test pieces of dynamic performance testing.
With reference to figure 6, in an embodiment of magnetic head fold piece combination 290 of the present invention, magnetic head fold piece combination 200 comprises cantilever part 290 and is arranged on the magnetic head 203 on described cantilever part.Described cantilever part 290 is comprised of the load beam 206 fitting together, substrate 208, articulated part 207 and flexible element 205.Described articulated part 207 is connected with described substrate 208 by the mounting hole 210 on described articulated part 207.Then, described magnetic head 203 is installed on flexible element 205.
Fig. 7 is an embodiment of disc drive unit of the present invention, the Spindle Motor 602 that this disc drive unit 600 comprises magnetic head fold piece combination 200, the actuating arm 604 being connected with described magnetic head fold piece combination 200, a plurality of rotatable disk 601 and drives described disk 601 rotations.Above-mentioned all parts are all arranged in housing 603.Because structure and/or the assembling process of disc drive unit of the present invention is that those of ordinary skill in the art knows, therefore the more details about disc drive unit structure and assembling repeat no more.
Because described brace 402 is provided with adjacently with described hole 401 and for bonding portion 4021 and the expose portion 4022 for test bonding with printed circuit board (PCB) 505, thereby described bonding terminal 304 both can be used for dynamic performance testing, can be used for again bonding.Therefore, do not need described additional areas to place dynamic performance testing sheet, thereby can shorten the length of described cantilever part, and then reduce the expense of batch production cantilever part.
What more than disclose is only preferred embodiment of the present invention, certainly can not limit with this interest field of the present invention.Therefore the equal variation of doing according to the present patent application the scope of the claims still belongs to the scope that the present invention is contained.
Claims (13)
1. the cantilever part for magnetic head fold piece combination, comprise flexible element, the afterbody of described flexible element is provided with many group electrical leads and a plurality of bonding terminals that are connected with printed circuit board (PCB), it is characterized in that: described in each, bonding terminal comprises brace and the hole that is formed on described brace one end, adhesives is passed through electrically and brace and described printed circuit board (PCB) described in mechanical connection in described hole, described brace is provided with the bonding portion adjacent with described hole and the expose portion for testing, described hole comprises a center pit and two grooves that are connected with described center pit, the described bonding portion of described brace is between two described grooves and described expose portion.
2. cantilever part as claimed in claim 1, is characterized in that: described brace is copper sheet.
3. cantilever part as claimed in claim 1, is characterized in that: described adhesives is scolder.
4. cantilever part as claimed in claim 1, it is characterized in that: described flexible element also comprises stainless steel layer and dielectric layers, wherein described in one deck, insulation course is formed between described stainless steel layer and another layer of described insulation course, and it is inner that described electrical lead is formed at another layer of described insulation course.
5. cantilever part as claimed in claim 4, is characterized in that: described insulation course is made by polyimide.
6. cantilever part as claimed in claim 1, is characterized in that: described flexible element also comprises the overlayer that is formed on described flexible element surface.
7. a magnetic head fold piece combination, comprising:
Magnetic head; And
Cantilever part, described cantilever part comprises the flexible element that supports described magnetic head, it is characterized in that:
The afterbody of described flexible element is provided with many group electrical leads and a plurality of bonding terminals that are connected with printed circuit board (PCB), wherein, described in each, bonding terminal comprises brace and the hole that is formed on described brace one end, adhesives is passed through electrically and brace and described printed circuit board (PCB) described in mechanical connection in described hole, described brace is provided with the bonding portion adjacent with described hole and the expose portion for testing, described hole comprises a center pit and two grooves that are connected with described center pit, the described bonding portion of described brace is between two described grooves and described expose portion.
8. magnetic head fold piece combination as claimed in claim 7, is characterized in that: described brace is copper sheet.
9. magnetic head fold piece combination as claimed in claim 7, is characterized in that: described adhesives is scolder.
10. magnetic head fold piece combination as claimed in claim 7, it is characterized in that: described flexible element also comprises stainless steel layer and dielectric layers, wherein described in one deck, insulation course is formed between described stainless steel layer and another layer of described insulation course, and it is inner that described electrical lead is formed at another layer of described insulation course.
11. magnetic head fold piece combination as claimed in claim 10, is characterized in that: described insulation course is made by polyimide.
12. magnetic head fold piece combination as claimed in claim 7, is characterized in that: described flexible element also comprises the overlayer that is formed on described flexible element surface.
13. 1 kinds of disc drive units, comprising:
Magnetic head fold piece combination, described magnetic head fold piece combination comprises magnetic head and supports the cantilever part of described magnetic head;
The actuating arm being connected with described magnetic head fold piece combination;
Disk;
Drive the Spindle Motor of described disk rotation; And
The printed circuit board (PCB) being connected with described magnetic head fold piece combination;
Described cantilever part comprises flexible element, the afterbody of described flexible element is provided with many group electrical leads and a plurality of bonding terminals that are connected with printed circuit board (PCB), wherein, described in each, bonding terminal comprises brace and the hole that is formed on described brace one end, adhesives is passed through electrically and brace and described printed circuit board (PCB) described in mechanical connection in described hole, described brace is provided with the bonding portion adjacent with described hole and the expose portion for testing, described hole comprises a center pit and two grooves that are connected with described center pit, the described bonding portion of described brace is between two described grooves and described expose portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910178249.0A CN102024459B (en) | 2009-09-23 | 2009-09-23 | Cantilever part with short flexible member tail, head gimbal assembly and disk drive unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910178249.0A CN102024459B (en) | 2009-09-23 | 2009-09-23 | Cantilever part with short flexible member tail, head gimbal assembly and disk drive unit |
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| Publication Number | Publication Date |
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| CN102024459A CN102024459A (en) | 2011-04-20 |
| CN102024459B true CN102024459B (en) | 2014-09-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200910178249.0A Active CN102024459B (en) | 2009-09-23 | 2009-09-23 | Cantilever part with short flexible member tail, head gimbal assembly and disk drive unit |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102044256A (en) * | 2009-10-16 | 2011-05-04 | 新科实业有限公司 | Cantilever and manufacture method thereof, head gimbal assembly with cantilever, and hard disk driver |
| CN103578486B (en) * | 2012-08-02 | 2017-12-05 | 新科实业有限公司 | Magnetic head fold piece combination and disc drive unit |
| CN104700844B (en) * | 2013-12-09 | 2018-08-10 | 新科实业有限公司 | Flexible element, magnetic head fold piece combination and disc driver |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1979642A (en) * | 2005-11-29 | 2007-06-13 | 新科实业有限公司 | Magnetic-head folded-piece combination and magnetic disc driving unit containing same |
| CN101042875A (en) * | 2006-03-24 | 2007-09-26 | 新科实业有限公司 | Magnetic head folding tabs assembly, flexible printed circuit thereof and testing method |
| CN101174422A (en) * | 2006-10-30 | 2008-05-07 | 新科实业有限公司 | Micro actuator, magnetic recording head tabs combination containing the same and disk drive unit |
-
2009
- 2009-09-23 CN CN200910178249.0A patent/CN102024459B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1979642A (en) * | 2005-11-29 | 2007-06-13 | 新科实业有限公司 | Magnetic-head folded-piece combination and magnetic disc driving unit containing same |
| CN101042875A (en) * | 2006-03-24 | 2007-09-26 | 新科实业有限公司 | Magnetic head folding tabs assembly, flexible printed circuit thereof and testing method |
| CN101174422A (en) * | 2006-10-30 | 2008-05-07 | 新科实业有限公司 | Micro actuator, magnetic recording head tabs combination containing the same and disk drive unit |
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| CN102024459A (en) | 2011-04-20 |
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