CN101038750A - Micro-driver having U-shaped frame and metal support frame and its manufacturing method - Google Patents
Micro-driver having U-shaped frame and metal support frame and its manufacturing method Download PDFInfo
- Publication number
- CN101038750A CN101038750A CN 200610067931 CN200610067931A CN101038750A CN 101038750 A CN101038750 A CN 101038750A CN 200610067931 CN200610067931 CN 200610067931 CN 200610067931 A CN200610067931 A CN 200610067931A CN 101038750 A CN101038750 A CN 101038750A
- Authority
- CN
- China
- Prior art keywords
- magnetic head
- pad
- metallic support
- framework
- piezoelectric element
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
A micro-driver for a magnetic head and floding sheet combination comprises a U-shape frame and a metal supporting frame. The U-shape frame includes a bottom supporting plate, a pair of edge arms extending from the bottom supporting plate and piezoelectric members mounted on the edge arms. Each piezoelectric member is excitated to result in selcection motion of the edge arms. The metal supporting frame includes a top supporting plate for supporting a magnetic head of the magnetic head and floding sheet combination, a bottom supporting plate for connecting a cantalever member of the magnetic head and floding sheet combination and a pair of edge arms connected with the bottom supporting plate. The metal supporting frame is mounted on the U-shape frame, so that the edge arms of the metal supporting frame are mounted on corresponding edge arms of the U-shape frame, and the bottom supporting plate of the metal supporting frame is mounted on the bottom supporting plate of the U-shape frame.
Description
Technical field
The present invention relates to a kind of information recording disk driver element, relate more specifically to a kind of magnetic head fold piece combination (head gimbal assembly, microdrive HGA) that is used for disc drive unit.
Background technology
A kind of common information storing device is a disk drive system, and it uses magnetic media to store data and the removable read/write head that is arranged at this magnetic media top comes optionally on the magnetic media reading of data or data are write on the magnetic media.
The consumer always wishes that the memory capacity of this class disk drive system constantly increases, and wishes that simultaneously its read or write speed is faster more accurate.Therefore disc drive manufacturers is devoted to develop the disk system with higher storage capacity always, such as increasing the density of track by reducing the track width on the disk or the mode of track pitch, and then increases the memory capacity of disk indirectly.Yet, along with the increase of track density, to the also raising accordingly of position control accuracy of read/write head, so that in compact disk, realize faster more accurate read-write operation.Along with the increase of track density, use conventional art to realize more accurate read/write head being positioned track suitable on the disk difficulty more that becomes sooner.Therefore, disc drive manufacturers is sought the mode of raising to the read/write head position control always, so that the benefit of utilizing ever-increasing track density to bring.
A kind of method that improves read/write head position control accuracy on compact disc that disc drive manufacturers is often used also is microdrive for adopting second driver.This microdrive cooperates common position control accuracy and the speed that realizes read/write head with a master driver.The disk system that comprises microdrive is called as Dual-drive system.
Once developed many Dual-drive systems that are used to improve access speed and read/write head bearing accuracy on the track of compact disk in the past.This Dual-drive system generally includes a keynote coil motor driver and a secondary microdrive, such as piezo-electric micro driver (be piezo-electric micro driver, be designated hereinafter simply as piezo-electric micro driver).This voice coil motor driver is controlled by servo-control system, and this servo-control system causes the actuating arm rotation, and the carrying read/write head is so that be positioned read/write head on the track suitable on the memory disc on this actuating arm.Piezo-electric micro driver and voice coil motor driver are used common raising access speed and realize the fine setting of read/write head position on track.Voice coil motor driver is to the position coarse adjustment of read/write head, and piezo-electric micro driver is to the accurate adjustment of read/write head with respect to the position of disk.By the cooperation of two drivers, realize data efficient and accurate read-write operation on memory disc jointly.
A kind of known being used to realizes the microdrive of read/write head fine position is included piezoelectric element.This piezo-electric micro driver has relevant electronic installation, and this electronic installation can cause the piezoelectric element on the microdrive optionally to shrink or expand.Piezo-electric micro driver has suitable structure, makes the contraction of piezoelectric element or the motion that expansion causes microdrive, and then causes the motion of read/write head.With respect to the disk system of only using voice coil motor driver, the motion of this read/write head can realize the faster more accurate adjustment in read/write head position.The exemplary piezo-electric micro driver of this class is exposed in many patents, the Jap.P. JP 2002-133803 that is called " microdrive and magnetic head fold piece combination " such as name, and name is called the Jap.P. JP 2002-074871 of " have the magnetic head fold piece combination of the driver of realizing fine position, comprise the disk system of this magnetic head fold piece combination and the manufacture method of this magnetic head fold piece combination ".The exemplary piezo-electric micro driver of this class is exposed in other patent simultaneously, such as United States Patent (USP) the 6th, 671, and No. 131 and the 6th, 700, No. 749.
Figure 1 and Figure 2 is traditional disc drive unit, and disk 101 is installed on the Spindle Motor 102 and by its rotation.Carry magnetic head fold piece combination 100 on the voice coil motor arm 104, this magnetic head fold piece combination 100 comprises the microdrive 105 that contains magnetic head 103, on this magnetic head 103 read/write head is installed.The motion of one voice coil motor control voice coil motor arm 104, and then control head 103 moving between the lip-deep track of disk 101 finally realize read/write head data write on disk 101.When running status, form aerodynamic force between the disk 101 of the magnetic head 103 that comprises read/write head and rotation and contact, and produce lift.The mutual balance of elastic force that the cantilever by magnetic head fold piece combination 100 of this lift and opposite sign but equal magnitude applies, and then cause in the whole radial stroke of motor arm 104, the surface of the disk 101 of rotation forms and keeps predetermined flying height.
Fig. 3 has showed the magnetic head fold piece combination 100 of traditional magnetic disk driver element shown in Fig. 1-2, has dual drive on it.Yet because the inherent error of voice coil motor and magnetic head cantilever combination, magnetic head 103 can't be realized fast and accurate position control on the contrary, but influences the performance that read/write head is is accurately read and write data on the disk.For this reason, increase above-mentioned piezo-electric micro driver 105, so that improve the position control accuracy of magnetic head and read/write head.More particularly, with voice coil motor relatively, this piezo-electric micro driver 105 is adjusted the displacement of magnetic head 103 with littler amplitude, so as the compensation voice coil motor and (or) resonance error of magnetic head cantilever combination.This piezo-electric micro driver makes that using littler track pitch becomes possibility, and can be with the track density (TPI of disk system, the contained track quantity of per inch) improve 50%, can reduce seeking rail and positioning time (seekingand settling time) of magnetic head simultaneously.Therefore, piezo-electric micro driver can increase substantially the surface recording density of memory disc.
With reference to figure 3, Fig. 4, traditional piezo-electric micro driver 105 comprises the U-shaped ceramic frame with two ceramic limit arms 107, on each ceramic limit arm 107 piezoelectric element is installed.Described ceramic limit arm 107 with magnetic head 103 fixings in the central, and the motion by limit arm 107 makes magnetic head 103 produce displacements.Described piezo-electric micro driver 105 physically is connected on the cantilever tongue piece 114 of suspended wall spare 113.Three are electrically connected and receive 109 (gold goal welding or tin ball bonding meet gold ball bonding or solder ball bonding, GBB or SBB) are fixed on this piezo-electric micro driver 105 on the cantilever lead 110 that is positioned at arm 107 both sides, ceramic limit.In addition, four Metal Ball 108 (gold goal welding or tin ball bonding connect) are installed to this cantilever lead 110 with magnetic head 103.
Fig. 5 has showed the general process that described magnetic head 103 is installed to described piezo-electric micro driver 105.As shown in the figure, this magnetic head 103 is connected to two precalculated positions 106 on described two ceramic limit arms 107 by epoxide-resin glue 112 parts.This connection makes the motion of magnetic head 103 depend on the motion of the ceramic limit arm 107 of described piezo-electric micro driver 105.On the ceramic limit of each of described piezo-electric micro driver 105 arm 107 piezoelectric element 116 is installed, so that exciting and the motion of control head 103 by piezoelectric element 116.More specifically, when applying voltage by described cantilever lead 110, described piezoelectric element 116 expands or shrinks, two ceramic limit arms 107 that cause described U-shaped microdrive framework are to common lateral bending, therefore make magnetic head 103 carry out lateral translations and on disc tracks, move, so that accurately adjust the position of described read/write head.In this way, can realize magnetic head 103 controllable displacements, so that realize fine position.
With reference to figure 6, has the salient point 162 that cooperates with cantilever tongue piece 114 on the load beam 160 of described cantilever part 113.Form a parallel clearance 170 between cantilever tongue piece 114 and microdrive 105, make when voltage is input to the piezoelectric element of described microdrive 105, microdrive 105 can successfully produce displacement to magnetic head 103.This gap 170 is extremely important for microdrive operation and magnetic head fold piece combination performance.
Fig. 7-8 has shown the tilt problem in the existing microdrive project organization.Because the problem of making, when described magnetic head flew on disk, described microdrive 105 may be wriggled (creep) or be tilted (tilt).Such as Fig. 7 explained when microdrive 105 when cantilever tongue piece 114 tilts, this gap 170 diminishes, Fig. 8 has explained when microdrive 105 when cantilever tongue piece 114 tilts dorsad, the big phenomenon of these gap 170 changes.A kind of common situation is that magnetic head dwell angle (head static angle) changes (shown in Fig. 7,8), and the inclination that a kind of worse situation is described microdrive may cause producing between microdrive 105 and the cantilever tongue piece 114 and interfere.These two kinds of situations all influence the microdrive performance, and can cause the read/write errors of magnetic head, cause static problem, influence the flying magnetic head performance, cause the Magnetic Head system failure, and/or cause microdrive malfunctioning.
Because above-mentioned design comprises the U-shaped ceramic frame, the fragility and the frangibility of described stupalith influence anti-seismic performance, such as strong inadequately anti-seismic performance.And the design in past is difficult to control the parallel clearance between microdrive and the cantilever tongue piece in manufacture process.In addition, the design in past is difficult to be applied to undersized magnetic head, and design in the past has difficulty in the magnetic head installation process, because magnetic head is installed on the inner surface of microdrive limit arm.
Therefore be necessary to provide a kind of improved system, to overcome the deficiencies in the prior art.
Summary of the invention
An aspect of of the present present invention relates to a kind of microdrive that is used for magnetic head fold piece combination, comprises U-shaped framework and metallic support framework.This U-shaped framework comprises end back up pad, an opposite side arm that extends from end back up pad and the piezoelectric element that is installed on the limit arm.The selectivity motion that each piezoelectric element is excited and causes the limit arm.This metallic support framework comprises the top back up pad of the magnetic head that supports magnetic head fold piece combination, the end back up pad that is connected with the cantilever part of magnetic head fold piece combination and the opposite side arm that top back up pad and end back up pad are connected to each other.This metallic support framework is installed on the U-shaped framework, and the limit arm of metallic support framework is installed on the corresponding side arms of U-shaped framework, and the end back up pad of metallic support framework is installed on the end back up pad of U-shaped framework.
Another aspect of the present invention relates to a kind of magnetic head fold piece combination, the cantilever part that it comprises microdrive, magnetic head and supports this microdrive and magnetic head.This microdrive comprises U-shaped framework and metallic support framework.The opposite side arm that described U-shaped framework comprises end back up pad, extend from back up pad of the described end and be installed in piezoelectric element on described each limit arm.Described each piezoelectric element is excited and causes the selectivity of described limit arm to be moved.Described metallic support framework comprises the top back up pad that supports described magnetic head, the end back up pad that is connected with described cantilever part and the opposite side arm that described top back up pad and end back up pad are connected to each other.Described metallic support framework is installed on the U-shaped framework, makes the limit arm of described metallic support framework be installed on the corresponding side arms of described U-shaped framework, and the end back up pad of described metallic support framework is installed on the end back up pad of described U-shaped framework.
Another aspect of the present invention relates to a kind of disc drive unit, and it comprises by microdrive, magnetic head and supports the magnetic head fold piece combination that the cantilever part of this microdrive and magnetic head is formed; The actuating arm that is connected with described magnetic head fold piece combination; Disk; And be used to drive the Spindle Motor of described disk.Described magnetic head fold piece combination comprises microdrive, magnetic head and supports the cantilever part of this microdrive and magnetic head.Described microdrive comprises U-shaped framework and metallic support framework.The opposite side arm that described U-shaped framework comprises end back up pad, extend from back up pad of the described end and be installed in piezoelectric element on described each limit arm.Described each piezoelectric element is excited and causes the selectivity of described limit arm to be moved.Described metallic support framework comprises the top back up pad that supports described magnetic head, the end back up pad that is connected with described cantilever part and the opposite side arm that described top back up pad and end back up pad are connected to each other.Described metallic support framework is installed on the U-shaped framework, makes the limit arm of described metallic support framework be installed on the corresponding side arms of described U-shaped framework, and the end back up pad of described metallic support framework is installed on the end back up pad of described U-shaped framework.
Another aspect of the present invention relates to a kind of manufacture method of magnetic head fold piece combination, and it comprises that first framed structure that will comprise piezoelectric element is installed to second framed structure, thereby forms microdrive; Described microdrive is installed on the cantilever part; Described piezoelectric element and cantilever part are electrically connected; Described piezoelectric element is carried out the piezoelectric property test; Magnetic head is installed on the described microdrive; Described magnetic head and cantilever part are electrically connected; Performance to described magnetic head is tested; And carry out final inspection.
Another aspect of the present invention relates to a kind of manufacture method of magnetic head fold piece combination, and it comprises first framed structure is installed on the cantilever part; Second framed structure that will comprise piezoelectric element is installed on first framed structure of described cantilever part, thereby forms microdrive; Described piezoelectric element and cantilever part are electrically connected; Described piezoelectric element is carried out the piezoelectric property test; Magnetic head is installed on the described microdrive; Described magnetic head and cantilever part are electrically connected; Performance to described magnetic head is tested; And carry out final inspection.
By following description also in conjunction with the accompanying drawings, it is more clear that the present invention will become, and these accompanying drawings are used to explain embodiments of the invention.
Description of drawings
Fig. 1 is the stereographic map of traditional magnetic disk driver element.
Fig. 2 is the partial perspective view of traditional magnetic disk driver element shown in Figure 1.
Fig. 3 is the stereographic map of traditional magnetic head fold piece combination.
Fig. 4 is the local view of apparatus of magnetic head fold piece combination shown in Figure 3.
Fig. 5 is the general process flow chart in the microdrive that magnetic head is inserted into magnetic head fold piece combination shown in Fig. 3,4.
Fig. 6 is the side view of magnetic head fold piece combination shown in Figure 3.
Fig. 7 is the side view of magnetic head fold piece combination shown in Figure 3, has showed that the microdrive that causes the gap between microdrive and the cantilever part to reduce tilts.
Fig. 8 is the side view of magnetic head fold piece combination shown in Figure 3, has showed that the microdrive that causes the gap enlargement between microdrive and the cantilever part tilts.
Fig. 9 is the described stereographic map that comprises the magnetic head fold piece combination of piezo-electric micro driver of one embodiment of the invention.
Figure 10 is the partial perspective view of magnetic head fold piece combination shown in Figure 9.
Figure 11 is the partial side view of magnetic head fold piece combination shown in Figure 9.
Figure 12 is the exploded view of magnetic head fold piece combination shown in Figure 9.
Figure 13 is that piezo-electric micro driver shown in Figure 9 takes out the stereographic map of back from top view from magnetic head fold piece combination.
Figure 14 is the stereographic map that piezo-electric micro driver shown in Figure 13 is observed from the bottom.
Figure 15 is the process flow diagram of described manufacturing of one embodiment of the invention and assembly process.
Figure 16 a-16d is a series of stereographic maps, has showed manufacturing shown in Figure 15 and assembly process.
Figure 17 is the process flow diagram of described manufacturing of another embodiment of the present invention and assembly process.
Figure 18 a-18d is a series of stereographic maps, has showed manufacturing shown in Figure 17 and assembly process.
Figure 19 is the described exploded view that contains the magnetic head fold piece combination of piezo-electric micro driver of another embodiment of the present invention.
Figure 20 is the stereographic map after the magnetic head fold piece combination assembling shown in Figure 19.
Embodiment
With reference now to accompanying drawing, describe embodiments of the invention, the similar elements label is represented similar elements in the accompanying drawing.One aspect of the present invention provides a kind of microdrive with appropriate configuration, makes between the cantilever part of this microdrive and magnetic head fold piece combination and keeps parallel clearance, utilizes this microdrive accurately to drive magnetic head simultaneously.By between the cantilever part of microdrive and magnetic head fold piece combination, keeping parallel clearance, the Performance Characteristics of disc drive unit is improved.
Several embodiment of the microdrive that is used for magnetic head fold piece combination are described now.It should be noted that described microdrive can be applicable in any magnetic disk drive with microdrive, and be not limited to the specific magnetic head fold piece combination shown in the accompanying drawing.Be that the present invention is applicable to any suitable equipment that contains microdrive in any field.
Fig. 9-14 is the described magnetic head fold piece combination 210 that contains piezo-electric micro driver 212 of exemplary embodiment of the present invention.This magnetic head fold piece combination 210 comprises piezo-electric micro driver 212, magnetic head 214 and is used to support the cantilever part 216 of described piezo-electric micro driver 212 and magnetic head 214.
Shown in Fig. 9-12, this cantilever part 216 comprises substrate 218, load beam 220, articulated part 222, flexible element 224 and is positioned at the inside and outside cantilever lead 226,227 of this flexible element 224.This substrate 218 comprises mounting hole 228, is used for cantilever part 216 is fixed on the actuating arm of the voice coil motor (VCM) of magnetic disk drive.The shape of this substrate 218 changes with the configuration or the model of magnetic disk drive.And this substrate 218 by relatively hard or rigidity preferably material form such as metal so that stably cantilever part 216 is supported on the actuating arm of described voice coil motor.
This articulated part 222 is by being connected to such as welding manner on substrate 218 and the load beam 220.As shown in the figure, this articulated part 222 comprises the hole 230 that the hole 228 with substrate 218 aligns.In addition, this articulated part 222 also comprises the fixing bar 232 that is used to support described load beam 220.
This load beam 220 is fixed on the fixing bar 232 of articulated part 222 by the mode such as welding.Form the salient point 234 (with reference to Figure 11) that cooperates with described flexible element 224 on this load beam 220.Also can have the sheet of recommending 236 on the described load beam 220, such as when disk stops the rotation, this is recommended sheet 236 magnetic head fold piece combination 210 is separated on disk.
Described flexible element 224 is by being installed on articulated part 222 and the load beam 220 such as the mode that laminates or weld.Have cantilever tongue piece 238 on this flexible element 224, be used for piezo-electric micro driver 212 is fixed to cantilever part 216 (with reference to Figure 12).Described cantilever tongue piece 238 cooperates with salient point 234 on the load beam 220.The cantilever lead 226,227 of described flexible element 224 electrically connects some connecting terminals 240 (being connected with external control system) and magnetic head 214 and the piezoelectric element 242,243 that is positioned on the piezo-electric micro driver 212.Described cantilever lead 226,227 can be flexible print circuit (flexible printed circuit, FPC) and the lead that can have right quantity.
Shown in Figure 10,11 and 12, connecting terminal 244 is directly connected on the interior cantilever lead 226, so that the connecting terminal 246 of cantilever lead in described 226 with piezoelectric element 242,243 electrically connected.Equally, connecting terminal 248 is directly connected on the outer cantilever lead 227, so that the connecting terminal 250 of outer cantilever lead 227 with magnetic head 214 electrically connected.
Described magnetic disk drive comprises voice coil motor, be used for controllably rotating actuating arm, and then controllably drive magnetic head fold piece combination 210, make that described magnetic head fold piece combination 210 drives described magnetic head 214 and relevant read/write head produces motion on the track of the disk of magnetic disk drive.Described piezo-electric micro driver 212 is used to realize accurately position control and the magnetic head tracking (seeking) and location (settling) time when reducing the disk operation fast of magnetic disk drive.Therefore, when in the magnetic disk drive during built-in this piezo-electric micro driver 212, just form Dual-drive system, wherein said voice coil motor realizes that the big position of read/write head adjusts, and the fine setting that described piezo-electric micro driver 212 is realized the read/write head position.
Figure 12-14 has showed the piezo-electric micro driver 212 after separating from magnetic head 214 and cantilever part 216.As shown in the figure, this piezo-electric micro driver 212 comprises two parts.Particularly, described piezo-electric micro driver 212 comprises the U-shaped framework 252 with piezoelectric element 242,243 and is used to support the metallic support framework 254 of this U-shaped framework 252.
Described U-shaped framework 252 comprises end back up pad 256 and the limit arm 258,259 that extends from this end back up pad 256.Described U-shaped framework 252 can be formed by metal, pottery or other suitable material.
Described piezoelectric element 242,243 be installed in respectively U-shaped framework 252 limit arm 258,259 on the surface in the outside.Have connecting terminal 246 on the described piezoelectric element 242,243,, be used for piezoelectric element 242,243 and interior cantilever lead 226 are electrically connected such as two contacts.Each piezoelectric element 242,243 can be membrane piezoelectric element, ceraminator or PMN-PT (PMN-PT) piezoelectric element, and can be single or multiple lift.
Described metallic support framework 254 comprises top back up pad 260, have the extension ledge structure end back up pad 262 of (extended stepstructure) 263 and the limit arm 264,265 that described top back up pad 260 and end back up pad 262 are connected to each other.
As shown in the figure, form some notches or space 266 between described top back up pad 260 and the corresponding side arms 264,265 and/or between back up pad 262 of the described end and the corresponding side arms 264,265.This structure allows limit arm 264,265 have longer effective length and wider freedom of motion.
Shown in Figure 13,14, described metallic support framework 254 is installed on the U-shaped framework 252, makes described limit arm 264,265 by on the inside surface that is installed to corresponding side arms 258,259 such as epoxide-resin glue.And, on the bottom surface of the extension ledge structure 263 of described metallic support framework 254 by the end back up pad 256 that is installed to described U-shaped framework 252 such as epoxide-resin glue.In one embodiment, when described U-shaped framework 252 is formed by stupalith, and when being installed on the metal material of described metallic support framework 254, described metallic support framework 254 is installed on the U-shaped framework 252 by epoxide-resin glue.Yet when described U-shaped framework 252 and metallic support framework 254 were all formed by the metal material manufacturing, described installation process can be laser bonding.
Shown in Figure 10,11, the end back up pad 262 of described metallic support framework 254 has appropriate configuration, thereby described piezo-electric micro driver 212 is connected to cantilever part 216.Particularly, the extension ledge structure 263 of described end back up pad 262 is by being installed to partly on the cantilever tongue piece 238 of flexible element 224 such as the mode of epoxide-resin glue, resin (resin) or welding.And, be positioned at the piezoelectricity connecting terminal 246 on the corresponding piezoelectric element 242,243, such as two connecting terminals receive by being electrically connected (gold goal welding or tin ball bonding meet GBBor SBB) 268 be positioned at cantilever lead 226 on corresponding connecting terminal 244 electric connections.This makes voltage to be applied on the described piezoelectric element 242,243 by interior cantilever lead 226.
Because described extension ledge structure 263 is installed on the bottom surface of end back up pad 256 of described U-shaped framework 252, when piezo-electric micro driver 212 is installed on the cantilever tongue piece 238, described extension ledge structure 263 will be sandwiched between cantilever tongue piece 238 and the U-shaped framework 252.Keep described parallel clearance 270 (with reference to Figure 11) when this structure helps to use between described piezo-electric micro driver 212 and the cantilever tongue piece 238, and help avoid the microdrive inclination between the described piezo-electric micro driver 212 and cantilever tongue piece 238 when using.
The top back up pad 260 of described metallic support framework 254 has appropriate configuration, and described piezo-electric micro driver 212 is fixed on the described magnetic head 214.Specifically, this magnetic head 214 is directly installed on this top back up pad 260.And a plurality of connecting terminals 250 on the described magnetic head 214 are such as receive by being electrically connected (gold goal welding or tin ball bonding meet GBB or SBB) 274 and electrically connecting mutually of corresponding connecting terminal 248 on six connecting terminals and the suspension board 272.This is connected to described magnetic head 214 with described piezo-electric micro driver 212, and the outer cantilever lead 227 of magnetic head 214 and read/write head and cantilever part 216 is electrically connected.
Because described magnetic head 214 directly is installed on the top back up pad 260 (rather than limit arm), the assembling ratio of described magnetic head fold piece combination is easier to.In addition, the structure of described piezo-electric micro driver 212 can change, for use in undersized magnetic head.Like this, described piezo-electric micro driver makes the manufacturing of magnetic head fold piece combination become easily and has reduced cost.
In the above-described embodiments, described each outer cantilever lead 227 has bend (curved portion) 27.When 212 operations of described piezo-electric micro driver, this structure helps to discharge the stress that the rigidity by described outer cantilever lead 227 causes, this makes described piezo-electric micro driver 212 more successfully move.
Figure 15, Figure 16 a-16d have showed the manufacturing of piezo-electric micro driver 212 according to an embodiment of the invention and the key step of assembly process.(step 1) among Figure 15 shown in Figure 16 a, is installed to (step 2 among Figure 15) on the metallic support framework 254 with described U-shaped framework 252 after operation begins.Then, shown in Figure 16 b, U-shaped framework 252 and metallic support framework 254 after the assembling are installed to the (step 3) among Figure 15 on the cantilever part 216.After the installation, described piezoelectric element 242,243 and cantilever part 216 are electrically connected (step 4) among Figure 15, and carry out the piezoelectric element performance checking (step 5) among Figure 15.Then, shown in Figure 16 c, described magnetic head 214 is installed to the (step 6) among Figure 15 on the metallic support framework 254 of piezo-electric micro driver 212.After magnetic head 214 is installed as Figure 16 d, described magnetic head 214 and cantilever part 216 are electrically connected (step 7) among Figure 15, and carry out the magnetic head performance checking (step 8) among Figure 15.At last, check that combinations thereof (make and the assembly process (step 10) among Figure 15 so that finish by the step 9) among Figure 15.
Figure 17, Figure 18 a-18d have showed the manufacturing of piezo-electric micro driver 212 in accordance with another embodiment of the present invention and the key step of assembly process.(step 1) among Figure 17 shown in Figure 18 a, is installed to (step 2 among Figure 17) on the cantilever part 216 with described metallic support framework 254 after operation begins.Then, shown in Figure 18 b, U-shaped framework 252 is installed to the (step 3) among Figure 17 on the metallic support framework 254 of cantilever part 216.After the installation, described piezoelectric element 242,243 and cantilever part 216 are electrically connected (step 4) among Figure 17, and carry out the piezoelectric element performance checking (step 5) among Figure 17.Then, shown in Figure 18 c, described magnetic head 214 is installed to the (step 6) among Figure 17 on the metallic support framework 254 of piezo-electric micro driver 212.After magnetic head 214 is installed as Figure 18 d, described magnetic head 214 and cantilever part 216 are electrically connected (step 7) among Figure 17, and carry out the magnetic head performance checking (step 8) among Figure 17.At last, check that combinations thereof (make and the assembly process (step 10) among Figure 17 so that finish by the step 9) among Figure 17.
The piezo-electric micro driver 312 of Figure 19,20 for describing in the another embodiment of the present invention.In this embodiment, the metallic support framework 354 of described piezo-electric micro driver 312 has the structure different with the metallic support framework 254 of described piezo-electric micro driver 212.The residue assembly and the piezo-electric micro driver 212 of described piezo-electric micro driver 312 are similar substantially, and represent with the label similar to the assembly of piezo-electric micro driver 212.
As shown in the figure, described metallic support framework 354 comprises top back up pad 360, has end back up pad 362 of extending ledge structure 363 and the limit arm 364,365 that described top back up pad 360 and end back up pad 362 are connected to each other.Described top back up pad 360 comprises swivel plate (rotatable plate) 380 and crooked linking arm or bridge (curved connection portionor bridge) 382,384 that described swivel plate 380 and corresponding side arms 364,365 are coupled together.During use, when described piezoelectric element 242,243 was excited, this structure allowed swivel plate 380 around himself center of gravity rotation.
In one embodiment, when described U-shaped framework 252 is formed by stupalith, and when being installed on the metal material of described metallic support framework 354, described metallic support framework 354 is installed on the U-shaped framework 252 by epoxide-resin glue.Yet when described U-shaped framework 252 and metallic support framework 354 were all formed by the metal material manufacturing, described installation can be adopted laser welding process.
Similar with above-mentioned piezo-electric micro driver 212, when piezo-electric micro driver 312 is installed on the cantilever tongue piece 238, described extension ledge structure 363 will be sandwiched between cantilever tongue piece 238 and the U-shaped framework 252.Keep described parallel clearance between described piezo-electric micro driver 312 and the cantilever tongue piece 238 when this structure helps to use, and help avoid the microdrive inclination between the described piezo-electric micro driver 312 and cantilever tongue piece 238 when using.
The magnetic head fold piece combination of describing in the embodiment of the invention that comprises piezo-electric micro driver 212 and 312 210 can be installed to disc driver (hard disk drive, HDD) in.This disc driver can be the structure of describing in conjunction with Fig. 1.Because structure, operation and the assembly process of disc driver are familiar with by those of ordinary skill in this field, omit the further detailed description about disc driver here, make the present invention more clear.Described piezo-electric micro driver 212 and 312 can be used in anyly to have the disc driver of microdrive or has in any equipment of microdrive.In one embodiment, described piezo-electric micro driver 212 and 312 disc drivers that are used to have higher rotation speed.
Above invention has been described in conjunction with most preferred embodiment, but the present invention is not limited to the embodiment of above announcement, and should contain various modification, equivalent combinations of carrying out according to essence of the present invention.
Claims (25)
1. microdrive that is used for magnetic head fold piece combination comprises:
U-shaped framework and metallic support framework,
Wherein, the opposite side arm that described U-shaped framework comprises end back up pad, extend from back up pad of the described end and be installed in piezoelectric element on described each limit arm, described each piezoelectric element are excited and cause the selectivity motion of described limit arm;
Described metallic support framework comprises the top back up pad of the magnetic head that supports described magnetic head fold piece combination, the end back up pad that is connected with the cantilever part of described magnetic head fold piece combination and the opposite side arm that described top back up pad and end back up pad are connected to each other;
Wherein, described metallic support framework is installed on the described U-shaped framework, makes the limit arm of described metallic support framework be installed on the corresponding side arms of described U-shaped framework, and the end back up pad of described metallic support framework is installed on the end back up pad of described U-shaped framework.
2. microdrive according to claim 1, it is characterized in that: have on the end back up pad of described metallic support framework and be used for the extension ledge structure (extended step structure) that is connected with described cantilever part, this extension ledge structure has makes the appropriate configuration of keeping the substantially constant gap between described top back up pad and the cantilever part in use.
3. microdrive according to claim 2 is characterized in that: described extension ledge structure is sandwiched between described cantilever part and the U-shaped framework.
4. microdrive according to claim 1, it is characterized in that: described piezoelectric element be installed in the U-shaped framework corresponding side arms on the surface in the outside, the limit arm of described metallic support framework be installed in the U-shaped framework corresponding side arms on the surface of inboard.
5. microdrive according to claim 1 is characterized in that: described each piezoelectric element is ceraminator, membrane piezoelectric element, PMN-PT (PMN-PT) piezoelectric element or other piezoelectric element.
6. microdrive according to claim 1 is characterized in that: between the corresponding side arms of described top back up pad and metallic support framework, and/or form notch or space between the corresponding side arms of end back up pad and metallic support framework.
7. microdrive according to claim 1 is characterized in that: described metallic support framework is installed to the U-shaped framework by epoxide-resin glue.
8. microdrive according to claim 1 is characterized in that: described U-shaped framework is formed by metal or stupalith.
9. microdrive according to claim 1 is characterized in that: described U-shaped framework is formed by metal material, and described metallic support framework is installed to the U-shaped framework by the laser bonding mode.
10. microdrive according to claim 1 is characterized in that: described top back up pad comprises swivel plate (rotatable plate) and the crooked linking arm (curved connection portion) that the corresponding side arms of described swivel plate and metallic support framework is coupled together.
11. a magnetic head fold piece combination comprises:
Microdrive;
Magnetic head; And
Support the cantilever part of described microdrive and magnetic head; Wherein
Described microdrive comprises U-shaped framework and metallic support framework;
Wherein, the opposite side arm that described U-shaped framework comprises end back up pad, extend from back up pad of the described end and be installed in piezoelectric element on described each limit arm, described each piezoelectric element are excited and cause the selectivity motion of described limit arm;
Described metallic support framework comprises the top back up pad that supports described magnetic head, the end back up pad that is connected with described cantilever part and the opposite side arm that described top back up pad and end back up pad are connected to each other;
Wherein, described metallic support framework is installed on the described U-shaped framework, makes the limit arm of described metallic support framework be installed on the corresponding side arms of described U-shaped framework, and the end back up pad of described metallic support framework is installed on the end back up pad of described U-shaped framework.
12. magnetic head fold piece combination according to claim 11, it is characterized in that: have on the end back up pad of described metallic support framework and be used for the extension ledge structure that is connected with described cantilever part, this extension ledge structure has makes the appropriate configuration of keeping the substantially constant gap between described top back up pad and the cantilever part in use.
13. magnetic head fold piece combination according to claim 12 is characterized in that: described extension ledge structure is sandwiched between cantilever part and the U-shaped framework.
14. magnetic head fold piece combination according to claim 11, it is characterized in that: described piezoelectric element be installed in the U-shaped framework corresponding side arms on the surface in the outside, the limit arm of described metallic support framework be installed in the U-shaped framework corresponding side arms on the surface of inboard.
15. magnetic head fold piece combination according to claim 11 is characterized in that: described each piezoelectric element is ceraminator, membrane piezoelectric element, PMN-PT piezoelectric element or other piezoelectric element.
16. magnetic head fold piece combination according to claim 11 is characterized in that: between the corresponding side arms of described top back up pad and metallic support framework, and/or form notch or space between the corresponding side arms of end back up pad and metallic support framework.
17. magnetic head fold piece combination according to claim 11 is characterized in that: described metallic support framework is installed to the U-shaped framework by epoxide-resin glue.
18. magnetic head fold piece combination according to claim 11 is characterized in that: described U-shaped framework is formed by metal or stupalith.
19. magnetic head fold piece combination according to claim 11 is characterized in that: described U-shaped framework is formed by metal material, and described metallic support framework is installed to the U-shaped framework by the laser bonding mode.
20. magnetic head fold piece combination according to claim 11 is characterized in that: described top back up pad comprises swivel plate and the crooked linking arm that the corresponding side arms of described swivel plate and metallic support framework is coupled together.
21. a magnetic disk drive comprises:
By microdrive, magnetic head and support the magnetic head fold piece combination that the cantilever part of microdrive and magnetic head is formed;
The actuating arm that is connected with described magnetic head fold piece combination;
Disk; And
Be used to drive the Spindle Motor of described disk, wherein
This microdrive comprises U-shaped framework and metallic support framework;
Wherein, the opposite side arm that described U-shaped framework comprises end back up pad, extend from back up pad of the described end and be installed in piezoelectric element on described each limit arm, described each piezoelectric element are excited and cause the selectivity motion of described limit arm;
Described metallic support framework comprises the top back up pad that supports described magnetic head, the end back up pad that is connected with described cantilever part and the opposite side arm that described top back up pad and end back up pad are connected to each other;
Wherein, described metallic support framework is installed on the described U-shaped framework, makes the limit arm of described metallic support framework be installed on the corresponding side arms of described U-shaped framework, and the end back up pad of described metallic support framework is installed on the end back up pad of described U-shaped framework.
22. the manufacture method of a magnetic head fold piece combination comprises:
First framed structure that will comprise piezoelectric element is installed to second framed structure, thereby forms microdrive;
Described microdrive is installed on the cantilever part;
Described piezoelectric element and described cantilever part are electrically connected;
Described piezoelectric element is carried out the piezoelectric property test;
Magnetic head is installed on the described microdrive;
Described magnetic head and described cantilever part are electrically connected;
Performance to described magnetic head is tested; And
Carry out final inspection.
23. method according to claim 22 is characterized in that: first framed structure that will comprise piezoelectric element is installed to second framed structure and comprises that the U-shaped framework that will contain piezoelectric element is installed to the step of metallic support framework.
24. the manufacture method of a magnetic head fold piece combination comprises:
First framed structure is installed on the cantilever part;
Second framed structure that will comprise piezoelectric element is installed on first framed structure of described cantilever part, thereby forms microdrive;
Described piezoelectric element and described cantilever part are electrically connected;
Described piezoelectric element is carried out the piezoelectric property test;
Magnetic head is installed on the described microdrive;
Described magnetic head and described cantilever part are electrically connected;
Performance to described magnetic head is tested; And
Carry out final inspection.
25. method according to claim 24 is characterized in that: described first framed structure is the metallic support framework, and described second framed structure is the U-shaped framework that comprises piezoelectric element.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610067931 CN101038750A (en) | 2006-03-15 | 2006-03-15 | Micro-driver having U-shaped frame and metal support frame and its manufacturing method |
| JP2007066721A JP2007250172A (en) | 2006-03-15 | 2007-03-15 | Microactuator equipped with u-shaped frame and metal support frame, and manufacturing method therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610067931 CN101038750A (en) | 2006-03-15 | 2006-03-15 | Micro-driver having U-shaped frame and metal support frame and its manufacturing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101038750A true CN101038750A (en) | 2007-09-19 |
Family
ID=38594254
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610067931 Pending CN101038750A (en) | 2006-03-15 | 2006-03-15 | Micro-driver having U-shaped frame and metal support frame and its manufacturing method |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2007250172A (en) |
| CN (1) | CN101038750A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101859570A (en) * | 2009-04-07 | 2010-10-13 | 新科实业有限公司 | Magnetic head and micro-driver combination, manufacture method thereof, magnetic head fold fin combination and disk drive unit |
| CN102148039A (en) * | 2010-02-10 | 2011-08-10 | 新科实业有限公司 | Magnetic head, magnetic head gimbal assembly and disk driving unit |
| CN114730575A (en) * | 2020-03-31 | 2022-07-08 | 西部数据技术公司 | Tape embedded drive with HDD assembly |
-
2006
- 2006-03-15 CN CN 200610067931 patent/CN101038750A/en active Pending
-
2007
- 2007-03-15 JP JP2007066721A patent/JP2007250172A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101859570A (en) * | 2009-04-07 | 2010-10-13 | 新科实业有限公司 | Magnetic head and micro-driver combination, manufacture method thereof, magnetic head fold fin combination and disk drive unit |
| CN102148039A (en) * | 2010-02-10 | 2011-08-10 | 新科实业有限公司 | Magnetic head, magnetic head gimbal assembly and disk driving unit |
| CN102148039B (en) * | 2010-02-10 | 2015-02-04 | 新科实业有限公司 | Magnetic head, magnetic head gimbal assembly and disk driving unit |
| CN114730575A (en) * | 2020-03-31 | 2022-07-08 | 西部数据技术公司 | Tape embedded drive with HDD assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2007250172A (en) | 2007-09-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7719798B2 (en) | Rotational micro-actuator integrated with suspension of head gimbal assembly, and disk drive unit with the same | |
| US7768746B2 (en) | Rotational micro-actuator with a rotatable plate, head gimbal assembly and disk drive device with the same | |
| US7312956B2 (en) | Micro-actuator, head gimbal assembly, and disk drive unit with the same | |
| US7609487B2 (en) | Thin-film PZT micro-actuator integral with suspension of head gimbal assembly, and disk drive unit with the same | |
| US7474512B2 (en) | Miro-actuator, head gimbal assembly, and disk drive unit with the same | |
| US7538984B2 (en) | Rotational PZT micro-actuator with a rotatable plate | |
| US7663843B2 (en) | Flex cable frame assembly for micro-actuator and flex cable suspension assembly for HGA of disk drive device | |
| US7417831B2 (en) | Micro-actuator and head gimbal assembly for a disk drive device | |
| US7298593B2 (en) | Micro-actuator including a leading beam pivot part, head gimbal assembly and disk drive unit with the same | |
| US7471490B2 (en) | Micro-actuator including U-shaped frame and metal support frame, and manufacturing method thereof | |
| US7535680B2 (en) | Micro-actuator with integrated trace and bonding pad support | |
| CN1797550A (en) | Composition of micro driver unit, vibration damper, fold piece set of magnetic head, and disc drive unit | |
| CN101042876A (en) | Cantalever component containing reinforcingplate, magnetic head folding tabs assembly and disk driving unit | |
| US20070139825A1 (en) | Micro-actuator mounting structure and method for manufacturing a head gimbal assembly | |
| CN1311429C (en) | Information head arm assembly and disc drive device having same | |
| CN1979643A (en) | Micro driver, magnetic head folded-piece combination and magnetic-disc driving unit | |
| CN101038750A (en) | Micro-driver having U-shaped frame and metal support frame and its manufacturing method | |
| US20070070552A1 (en) | Micro-actuator and head gimbal assembly for a disk drive device | |
| CN1917044A (en) | Combination of flexible electric cable frame, and combination of flexible cable cantalever in use for disk drive | |
| CN1905012A (en) | Magnetic head flap combination with microdriver and magnetic disk driver thereof | |
| CN1920958A (en) | Micro-actuator and magnetic head tabs assembled for disk driver | |
| CN101051511A (en) | Micro ectuator, micro ectuator suspension arm part and magnetic head folding sheet combination | |
| CN1991984A (en) | Rotating micro-driver and disc driver element containing same | |
| CN1949366A (en) | Testing method and system for testing magnetic head on magnetic head flap combination of magnetic disk driver | |
| CN100535994C (en) | Micro-actuator and magnetic head tabs assembled for disk driving device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |