WO2016051726A1 - ホールセンサの製造方法及びホールセンサ並びにレンズモジュール - Google Patents
ホールセンサの製造方法及びホールセンサ並びにレンズモジュール Download PDFInfo
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- WO2016051726A1 WO2016051726A1 PCT/JP2015/004807 JP2015004807W WO2016051726A1 WO 2016051726 A1 WO2016051726 A1 WO 2016051726A1 JP 2015004807 W JP2015004807 W JP 2015004807W WO 2016051726 A1 WO2016051726 A1 WO 2016051726A1
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- hall element
- external terminal
- hall
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Classifications
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N52/00—Hall-effect devices
- H10N52/80—Constructional details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
- G01R33/06—Measuring direction or magnitude of magnetic fields or magnetic flux using galvano-magnetic devices
- G01R33/07—Hall effect devices
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N52/00—Hall-effect devices
- H10N52/101—Semiconductor Hall-effect devices
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
- H01L2224/4805—Shape
- H01L2224/4809—Loop shape
- H01L2224/48091—Arched
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
- H01L2224/481—Disposition
- H01L2224/48151—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive
- H01L2224/48221—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked
- H01L2224/48245—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being metallic
- H01L2224/48247—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being metallic connecting the wire to a bond pad of the item
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/73—Means for bonding being of different types provided for in two or more of groups H01L2224/10, H01L2224/18, H01L2224/26, H01L2224/34, H01L2224/42, H01L2224/50, H01L2224/63, H01L2224/71
- H01L2224/732—Location after the connecting process
- H01L2224/73251—Location after the connecting process on different surfaces
- H01L2224/73265—Layer and wire connectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/93—Batch processes
- H01L2224/95—Batch processes at chip-level, i.e. with connecting carried out on a plurality of singulated devices, i.e. on diced chips
- H01L2224/97—Batch processes at chip-level, i.e. with connecting carried out on a plurality of singulated devices, i.e. on diced chips the devices being connected to a common substrate, e.g. interposer, said common substrate being separable into individual assemblies after connecting
Definitions
- the present invention relates to a Hall sensor manufacturing method, a Hall sensor, and a lens module.
- Patent Document 1 describes an islandless structure magnetic sensor using a pellet (magnetic sensor chip such as a Hall element) and a manufacturing method thereof.
- FIG. 1 is a cross-sectional configuration diagram for explaining a problem of the Hall sensor according to the present invention.
- FIG. 1 is a diagram showing a part of the manufacturing process of the Hall sensor, and shows a process of placing the Hall element 510 in a region surrounded by the lead terminals 525 and 527 using the collet 600.
- the lead terminals 525 and 527 are placed on the base material 530, and an insulating layer 540 is formed on the back surface of the Hall element 510.
- the Hall element 510 includes a magnetic sensing part 512 and electrode parts 513a and 513b.
- the Hall element 510 When the Hall element 510 is thin and the distance between the position where the Hall element 510 is placed and the lead terminals 525 and 527 is small, when the Hall element 510 is placed using the collet 600, the collet 600 becomes the lead terminal. 525 and 527 may be touched. When the collet 600 comes into contact with the lead terminals 525 and 527, the Hall element 510 may be placed at a position different from the position where the Hall element 510 is normally placed. Variation in the position of the Hall element 510 leads to variation in the position of the magnetic sensing part 512, and ultimately leads to variation in the magnetic characteristics of the Hall sensor. In addition, A has shown the contact location of a collet and a lead terminal.
- the present invention has been made in view of such problems, and an object of the present invention is to provide a Hall sensor manufacturing method, a Hall sensor, and a lens module that are thin, small, and have little variation in magnetic characteristics. is there.
- a Hall element having a plurality of electrode portions, a plurality of external terminals arranged around the Hall element, each electrode portion of the plurality of electrode portions, and each external terminal of the plurality of external terminals.
- a plurality of conductive wires that are electrically connected to each other, a sealing element that seals the Hall element, the plurality of conductive wires, and a second surface that is a surface connected to the conductive wires of each external terminal;
- the first surface of each external terminal opposite to the second surface is exposed from the bottom surface of the sealing member, and the plurality of external terminals include at least a first external terminal,
- the first external terminal has a step on the second surface and on the periphery of the region surrounding the Hall element in plan view, and the first external terminal has the step as a boundary. It has a first part on the side close to the Hall element and a second part on the side far from the Hall element.
- the height from the bottom surface of the sealing member to the second surface at the first portion of the first external terminal is higher than the height to the second surface at the second portion. It is a Hall sensor formed low.
- the Hall element has the highest point of the Hall element at the first portion of the first external terminal with the bottom surface of the sealing member as a reference plane. It is arranged at a position higher than the surface and lower than the second surface in the second part.
- the Hall element has a height T from the reference plane to the highest point of the Hall element, and the second surface in the second region from the reference plane Is set at a position where p2 ⁇ T ⁇ 1.5 ⁇ p2.
- the plurality of external terminals further include second to fourth external terminals, and the first to fourth external terminals are the first to fourth terminals.
- the virtual straight line connecting the external terminal and the third external terminal and the virtual straight line connecting the second external terminal and the fourth external terminal are arranged so as to intersect in plan view, and the Hall element is
- the four vertices of the Hall element are regions between the first external terminal and the second external terminal, and the second external terminal and the third external surface. Arranged in the region between the external terminals, the region between the third external terminal and the fourth external terminal, and the region between the fourth external terminal and the first external terminal. Has been.
- the Hall element includes an insulating layer disposed on a surface opposite to a surface on which the plurality of electrode portions are disposed, and the insulating layer includes: It is exposed from the bottom surface of the sealing member.
- each external terminal of the plurality of external terminals has the step on the second surface, and each external terminal has the step as a boundary. , Having the first part on the side closer to the Hall element, having the second part on the side far from the Hall element, and using the bottom surface of the sealing member as a reference plane, the external terminals The height of the first part to the second surface is formed lower than the height of the second part to the second surface.
- each of the external terminals has the step formed on a circumference of a circular shape, a polygonal shape, or a combination thereof centered on the Hall element in plan view. ing.
- a Hall element having a plurality of electrode parts, a plurality of external terminals arranged around the Hall element, each electrode part of the plurality of electrode parts, and each external terminal of the plurality of external terminals.
- a plurality of conducting wires that are electrically connected to each other, and a sealing member that seals the Hall element, the plurality of conducting wires, and a second surface that is a surface connected to the conducting wires of each of the external terminals, A first surface opposite to the second surface of each external terminal is exposed from the bottom surface of the sealing member, and each external terminal is a second surface to which the plurality of conducting wires are connected.
- the height on the second surface side in the second part with the bottom surface of the sealing member as a reference surface is the sealing It becomes lower than the height on the second surface side in the first part with the bottom surface of the member as a reference surface.
- the difference is a Hall sensor to be formed.
- the height from the bottom surface of the sealing member to the contact point where the electrode portion of the Hall element and the plurality of conductors contact each other is based on the bottom surface of the sealing member. It is lower than the height on the second surface side in the first part.
- the step has a slope shape or a curved shape recessed in the bottom surface side of the sealing member in a sectional view.
- each of the external terminals has a circular shape, a polygonal shape, or a combination thereof in a plan view centered on the Hall element. The step is formed on the circumference.
- the Hall element includes a substrate, a magnetic sensing portion provided on or in the substrate, and the plurality of electrode portions connected to the magnetic sensing portion. And an insulating layer disposed on a surface opposite to a surface on which the plurality of electrode portions of the Hall element are disposed, and the insulating layer is exposed from the bottom surface of the sealing member.
- a method of manufacturing a Hall sensor comprising: an external terminal arranging step of arranging a metal plate on which a plurality of external terminals are formed on a substrate; and arranging the Hall element in a region surrounded by the plurality of external terminals Hall element disposing step, conducting wire connecting step of electrically connecting the plurality of electrode portions and the plurality of external terminals with the plurality of conducting wires, the Hall element, the plurality of conducting wires, and the respective external terminals
- a sealing step of sealing the second surface which is a surface connected to the conductive wire, with a sealing member, and removing the base material, and the second surface of each external terminal opposite to the second surface
- the plurality of external terminals include at least a first external terminal,
- the first external terminal has a first portion on a side near the position where the Hall element is placed, with the step as a boundary. And having a second part on the side far from the position where the Hall element is placed, and the first external terminal is formed on the base material when the metal plate is disposed on the base material.
- a method of manufacturing a Hall sensor comprising: an external terminal arranging step of arranging a metal plate on which a plurality of external terminals are formed on a substrate; and arranging the Hall element in a region surrounded by the plurality of external terminals Hall element disposing step, conducting wire connecting step of electrically connecting the plurality of electrode portions and the plurality of external terminals with the plurality of conducting wires, the Hall element, the plurality of conducting wires, and the respective external terminals
- the plurality of external terminals include at least a first external terminal, and
- the first external terminal has a first portion on the side close to the position where the Hall element is placed with the step as a boundary. And a second portion on the side far from the position where the Hall element is placed, and the first external terminal is arranged on the base when the metal plate is disposed on the base.
- a Hall sensor in which the height to the second surface in the first portion is lower than the height to the second surface in the second portion, with the surface on which the metal plate is disposed as a reference surface It is a manufacturing method.
- the Hall element placement step is characterized in that the Hall element is the highest point of the Hall element, with a surface on which the metal plate of the base is placed as a reference plane. And a step of disposing the first external terminal at a position that is higher than the second surface of the first portion and lower than the second surface of the second portion.
- the height from the reference plane to the highest point of the hall element is T, and the second portion from the reference plane The step of disposing the Hall element at a position where p2 ⁇ T ⁇ 1.5 ⁇ p2, where p2 is the height of the second surface in FIG.
- the plurality of external terminals further include second to fourth external terminals, and the first to fourth external terminals are the first to fourth terminals.
- the virtual straight line connecting the external terminal and the third external terminal and the virtual straight line connecting the second external terminal and the fourth external terminal are arranged so as to intersect in plan view, and the Hall element is It is rectangular in a plan view, and the Hall element disposing step is a plan view in which the four apexes of the Hall element are regions between the first external terminal and the second external terminal, A region between an external terminal and the third external terminal; a region between the third external terminal and the fourth external terminal; and a region between the fourth external terminal and the first external terminal. Disposing the Hall element to be disposed.
- the method includes an insulating layer forming step of forming an insulating layer between the base material and the Hall element, and the exposing step includes sealing the insulating layer with the sealing element. Exposing from the member. (20); In any one of (14) to (19), each external terminal of the plurality of external terminals has the step on the second surface, and each external terminal has the step as a boundary.
- each external terminal is
- the surface of the base material on which the metal plate is disposed is used as a reference surface, and the height to the second surface of the first portion of each external terminal is high. Is formed lower than the height to the second surface in the second part.
- a Hall sensor manufacturing method it is possible to provide a Hall sensor manufacturing method, a Hall sensor, and a lens module that are thin, small, and have little variation in magnetic characteristics.
- FIG. 1 is a cross-sectional configuration diagram for explaining a problem of the Hall sensor according to the present invention.
- FIGS. 2A to 2C are configuration diagrams for explaining the first embodiment of the Hall sensor according to the present invention.
- FIG. 3 is an overall perspective view of the Hall sensor shown in FIGS. 4A and 4B are configuration diagrams of specific Hall elements.
- FIG. 5 is a cross-sectional configuration diagram for explaining the Hall sensor according to the present invention.
- 6A and 6B are views showing a metal plate used for manufacturing the Hall sensor of the first embodiment.
- 7A to 7E are plan views showing the steps of the Hall sensor manufacturing method.
- 8A to 8D are cross-sectional views showing the steps of the Hall sensor manufacturing method.
- FIGS. 2A to 2C are configuration diagrams for explaining the first embodiment of the Hall sensor according to the present invention
- FIG. 2A is a cross-sectional view taken along line AA in FIG. 2 (b) is a plan view of FIG. 2 (a)
- FIG. 2 (c) is a bottom view of FIG. 2 (a)
- FIG. 3 is an overall perspective view of the Hall sensor shown in FIGS. 2 (a) to 2 (c). Is shown.
- Ga represents a half-etched surface
- Gb represents a portion subjected to half-etching on the back surface.
- the Hall sensor 100 includes a Hall element 10, a plurality of lead terminals 21a to 21d (external terminals), a plurality of conducting wires 31a to 31d, and a sealing member 50.
- the Hall element 10 includes a substrate 11, a magnetic sensing part 12 provided on the substrate 11 (or in the substrate 11), and a plurality of electrode parts 13 a to 13 d connected to the magnetic sensing part 12. .
- FIG. 2A the case where the magnetic sensitive part 12 is provided on the substrate 11 is shown in an enlarged view.
- the plurality of lead terminals 21 a to 21 d are arranged so as to surround the four corners of the Hall element 10 around the Hall element 10, that is, along the bottom surface of the sealing member 50.
- the plurality of conductive wires 31a to 31d electrically connect each of the electrode portions 13a to 13d of the plurality of electrode portions 13a to 13d and each of the lead terminals 21a to 21d of the plurality of lead terminals 21a to 21d.
- the sealing member 50 covers the Hall element 10, the plurality of lead terminals 21a to 21d, and the plurality of conductive wires 31a to 31d.
- the sealing member 50 is preferably a resin member such as a mold resin.
- Each lead terminal 21a to 21d has a second surface M2 connected to each of the conductive wires 31a to 31d and a first surface M1 opposite to the second surface M2, and this first surface. M1 is exposed from the bottom surface E of the sealing member 50.
- At least one of the plurality of lead terminals 21a to 21d has a step D on the second surface M2. That is, the lead terminal has a step. All of the lead terminals 21a to 21d preferably have a step D on the second surface M2. Further, the plurality of lead terminals 21a to 21d have the first portion N1 on the side close to the Hall element 10 of each lead terminal 21a to 21d having the step D with the step D as a boundary, and the side far from the Hall element 10
- the height p1 from the bottom surface E of the sealing member 50 to the second surface M2 in the first region N1 is the second portion N2 in the second region N2 from the bottom surface E of the sealing member 50. It is configured to be lower than the height p2 up to the second surface M2.
- each of the conducting wires 31a to 31d is connected to the second surface M2 in the second portion N2 of each of the lead terminals 21a to 21d having the step D.
- the external terminals 21a to 21d are connected to the bottom surface E of the sealing member from the second portion N2 to which the plurality of conductive wires are connected to the first portion N1 closer to the Hall element than the second portion N2.
- the height p2 on the second surface side in the second portion N2 with reference plane as the reference plane is lower than the height p1 on the second surface side in the first portion N1 with the bottom surface E of the sealing member as the reference plane.
- a step is formed.
- the step is preferably in a form having a slope shape or a curved shape recessed in the bottom surface side of the sealing member in a sectional view.
- the step D may have a flat upper surface and a lower surface, and a space between the upper surface and the lower surface may be a slope shape, a curved shape, or a combination thereof, and a slope shape, a curved shape, or a combination thereof from the upper surface. You may reach the end of the external terminal.
- a collet is generally used when the Hall element 10 is placed at a predetermined position. Since the tip of the collet is often elliptical or polygonal, in order to prevent contact between the collet and the plurality of lead terminals 21a to 21d, an elliptical or polygonal region centered on the Hall element 10 in plan view A step D is provided on the circumference. That is, the step D is provided at a position corresponding to the shape of the tip of the collet used when arranging the Hall element in the plan view. Further, since the tip of the collet is often circular, it is preferable to provide a step D on the circumference centered on the Hall element 10 in order to prevent the collet from contacting.
- the step D is formed on the periphery of the region surrounding the Hall element 10. It may be provided on the circumference of a region having a circular shape, a polygonal shape, or a combination thereof in plan view with the Hall element 10 as the center. Specific examples include the circumference of a perfect circle area, the circumference of an elliptical area, the circumference of a polygonal area, and the circumference of an area having a combination of a curve and a straight line.
- the conducting wire contacts the edge of the lead terminal and breaks. It is possible to suppress this.
- part N1 on a lead terminal shall be made as small as possible from the surface of the intensity
- the height p1 from the bottom surface E of the sealing member 50 to the second surface M2 in the first portion N1 is lower than the height h1 from the bottom surface E of the sealing member 50 to the highest point of the Hall element 10. It is configured.
- the height p1 is a height h1 from the bottom surface E of the sealing member 50 to each electrode portion 13a to 13d of the Hall element 10. It is configured lower than.
- the height h1 from the bottom surface E of the sealing member 50 to the highest point of the Hall element 10 has a relationship of p1 ⁇ h1 ⁇ p2. That is, the height h1 from the bottom surface E of the sealing member 50 to the contact point where the electrode portion of the Hall element and the plurality of conductors contact each other is the first portion N1 in the first region N1 with the bottom surface E of the sealing member 50 as the reference surface. It is lower than the height p1 on the two sides.
- the Hall element 10 is thin and the height from the bottom surface E of the sealing member 50 to the highest point of the Hall element 10 is lower than the height from the bottom surface E to the highest point of the lead terminals 21a to 21d.
- the tip D is particularly effective in the case of such a configuration because the tip of the contact is likely to contact the lead terminals 21a to 21d.
- the height h1 from the bottom surface E of the sealing member 50 to the first connection point a between each of the electrode portions 13a to 13d and each of the conductive wires 31a to 31d is from the bottom surface E of the sealing member 50 to each of the lead terminals 21a to 21a.
- or 31d are comprised so that it may become lower than the height h2 to the 2nd connection point b.
- the height h1 from the bottom surface E of the sealing member 50 to the first connection point a and the height h2 from the bottom surface E of the sealing member 50 to the second connection point b are in a relationship of h1 ⁇ h2.
- the Hall sensor of Embodiment 1 has a relationship of h1 ⁇ h2
- the conducting wires 31a to 31d are unlikely to contact the edge of the substrate 11 of the Hall element, and a leak current is unlikely to occur.
- the Hall sensor according to the first embodiment has a structure in which the contact between the edge of the lead terminal and the lead wire is likely to occur.
- two lead wires are connected to the lead terminal having the same potential. There is no problem in particular.
- the lead terminals 21 a to 21 d are exposed from the side surface S of the sealing member 50. That is, since the lead terminals 21a to 21d are exposed from the side surface S of the sealing member 50, the portion exposed to the side surface (the bottom electrode) in addition to the portion exposed to the bottom surface of the lead terminals 21a to 21d (the bottom electrode). It can be mounted using side electrodes). In particular, since the ratio of the side electrodes in the entire thickness can be increased, mounting is facilitated. In addition, the contact between the lead terminal and the solder is poor, and it is less likely that continuity cannot be obtained, and the mounting reliability is high. Furthermore, the visibility in the appearance inspection after solder mounting is improved, and it can be easily confirmed whether or not the soldering is performed without any problem.
- the plurality of electrode portions 13a to 13d are the first bonding
- the second surface M2 in the second portion N2 of the plurality of lead terminals 21a to 21d is the second bonding.
- Wire bonding is performed so that Thus, since wire bonding is performed from the lower side to the higher side, the wire is less likely to contact the edge of the Hall element. Thereby, even if the distance between the Hall element and the lead terminal is shortened, the edge contact hardly occurs. As a result, the distance between the Hall element and the lead terminal can be shortened, and the size can be reduced.
- the second surface M2 in the second portion N2 of the plurality of lead terminals 21a to 21d is the first bonding
- the plurality of electrode portions 13a to 13d are the second bonding. Wire bonding is performed so that
- the substrate 11 further includes an insulating layer 40 provided on the surface opposite to the surface on which the plurality of electrode portions 13a to 13d are provided. The insulating layer 40 is exposed from the bottom surface E of the sealing member 50.
- examples of the insulating layer 40 include an insulating resin layer and an insulating sheet.
- the insulating layer 40 may be any resistance that is higher than the resistance of the Hall element.
- the volume resistivity of the insulating layer 40 is preferably 10 8 to 10 20 ( ⁇ ⁇ cm). More preferably, the volume resistivity of the insulating layer 40 is 10 10 to 10 18 ( ⁇ ⁇ cm).
- the resistance of the insulating layer 40 is 10 10 to 10 18 ( ⁇ )
- the resistance of the Hall element is usually about 10 9 ⁇ or less. Insulating property.
- the insulating layer 40 includes, for example, an epoxy thermosetting resin and silica (SiO 2 ) as a filler.
- the insulating layer 40 is in contact with the back surface of the Hall element 10, that is, the surface opposite to the surface having the magnetic sensing portion 12, and the back surface of the Hall element 10 is covered with the insulating layer 40. It is preferable from the viewpoint of suppressing the occurrence of leakage current that the entire back surface of the Hall element 10 is covered with the insulating layer 40.
- the thickness of the portion of the insulating layer 40 that covers the back surface of the Hall element 10 is determined by the filler size, and is, for example, 5 ⁇ m or more.
- the Hall element 10 is electrically connected to, for example, a semi-insulating gallium arsenide (GaAs) substrate 11, a magnetic sensing part (active layer) 12 made of a semiconductor thin film formed on the GaAs substrate 11, and the magnetic sensing part 12. And electrode portions 13a to 13d connected to.
- the magnetic sensing part 12 is, for example, a cross shape in plan view, and electrodes 13a to 13d are provided on the four tip parts of the cross, respectively.
- a pair of electrodes 13a and 13c facing each other in plan view are input terminals for flowing current to the magnetic sensing portion 12, and another pair of electrodes 13b and 13d facing each other in a direction orthogonal to the line connecting the electrodes 13a and 13c in plan view.
- the surface of the substrate 11 opposite to the surface on which the magnetically sensitive portion (active layer) 12 is provided may be polished.
- the dimensions of the Hall element 10 are, for example, a length of 0.1 mm to 0.4 mm, a width of 0.1 mm to 0.4 mm, and a thickness of 0.05 mm to 0.20 mm.
- the hall sensor 100 has an islandless structure and has a plurality of lead terminals 21a to 21d for obtaining an electrical connection with the outside. As illustrated in FIG. 2B, the lead terminals 21 a to 21 d are arranged around the Hall element 10, for example, near the four corners of the Hall sensor 100. For example, the lead terminal 21a and the lead terminal 21c are arranged so as to face each other with the Hall element 10 interposed therebetween. Further, the lead terminal 21b and the lead terminal 21d are arranged so as to face each other with the Hall element 10 interposed therebetween.
- the lead terminals 21 to 21d are arranged such that a straight line (imaginary line) connecting the lead terminal 21a and the lead terminal 21c and a straight line (imaginary line) connecting the lead terminal 21b and the lead terminal 21d intersect in plan view. Each is arranged.
- the plurality of lead terminals include first to fourth lead terminals, and the first to fourth lead terminals include a virtual straight line connecting the first lead terminal and the third lead terminal and the second lead.
- the virtual straight line connecting the terminal and the fourth lead terminal is arranged so as to intersect in plan view.
- the lead terminals 21a to 21d are made of a metal such as copper (Cu), for example.
- the lead terminals 21a to 21d may be etched (that is, half-etched) on the surface side or a part of the back surface.
- Ag plating is applied to the surfaces of the lead terminals 21a to 21d connected by the conducting wires 31a to 31d on the surface of the lead terminals 21a to 21d (the upper surface side in FIG. 2A). It is preferable from the viewpoint of electrical connection.
- the front and back surfaces of the lead terminals 21a to 21d may be plated with nickel (Ni) -palladium (Pd) -gold (Au) or the like instead of the exterior plating layer 60.
- Ni nickel
- Pd palladium
- Au gold
- the conducting wires 31a to 31d are conducting wires that electrically connect the electrode portions 13a to 13d of the Hall element 10 and the lead terminals 21a to 21d, and are made of, for example, gold (Au). As shown in FIG.
- the conducting wire 31a connects the lead terminal 21a and the electrode portion 13a
- the conducting wire 31b connects the lead terminal 21b and the electrode portion 13b
- Conductive wire 31c connects lead terminal 21c and electrode portion 13c
- conductive wire 31d connects lead terminal 21d and electrode 13d.
- the sealing member 50 covers and protects the Hall element 10 and at least the surface side of the lead terminals 21a to 21d, that is, the surface connected to the conducting wire, and the conducting wires 31a to 31d with resin sealing.
- the sealing member 50 is made of, for example, an epoxy-based thermosetting resin and can withstand high heat during reflow. Note that the material of the sealing member 50 and the insulating layer 40 are different from each other even in the case of the same epoxy-based thermosetting resin. For example, the components to be contained are different, or the content ratio is different even if the components to be contained are the same. Further, as shown in FIG.
- the exterior plating layer 60 is formed on the back surfaces of the lead terminals 21 a to 21 d exposed from the sealing member 50.
- the exterior plating layer 60 is made of, for example, tin (Sn).
- the lead terminal 21 a is a power supply lead terminal that supplies a predetermined voltage to the Hall element 10.
- the lead terminal 21 c is a ground lead terminal that supplies a ground potential to the Hall element 10.
- the lead terminals 21 b and 21 d are signal extraction lead terminals for extracting the Hall electromotive force signal of the Hall element 10.
- FIGS. 4A and 4B are configuration diagrams of specific Hall elements, FIG. 4A shows a cross-sectional view, and FIG. 4B shows a top view. However, the conducting wire is not shown.
- symbol Ga indicates a half-etched surface
- Gb indicates a portion subjected to half-etching on the back surface.
- 2A is a cross-sectional view taken along the line AA in FIG. 2B, but the cross-sectional view shown in FIG. 4A is a cross-sectional view taken along the line BB in FIG. 4B. Is shown.
- the Hall sensor shown in FIGS. 4A and 4B uses a lead terminal designed so as to minimize contact with the collet, and the surface of the lead terminal is half-etched. That is, the area where the collet interferes is half-etched.
- the Hall element of the Hall sensor shown in FIG. 4B is arranged to be rotated by 45 degrees with respect to the Hall element of the Hall sensor shown in FIG. That is, the Hall element of the Hall sensor shown in FIG. 4B has a rectangular shape in plan view, and four vertices of the rectangle are regions between the lead terminals 21a and 21b in plan view, respectively.
- the Hall elements are arranged so as to be arranged in a region between the lead terminals 21b and 21c, a region between the lead terminals 21c and 21d, and a region between the lead terminals 21d and 21a. . By arranging the Hall elements in such a direction, it is possible to reduce the size of the Hall sensor as a whole.
- the Hall element when the Hall element is arranged in this way, the collet is likely to come into contact with the lead terminal when the Hall element is placed. Therefore, when the Hall element is arranged in this way, a step is formed on the second surface M2 of the lead terminals 21a to 21d. Providing D is particularly effective for preventing collet contact.
- the rectangle includes a square.
- the description has focused on the islandless structure in which there is no metal island for placing the Hall element 10 between the Hall element 10 and the bottom surface E of the sealing member 50.
- An island may be provided between the bottom surface E of the sealing member 50.
- the island may be electrically connected to the ground lead terminal 21c.
- the case where all of the plurality of lead terminals 21a to 21d have the step D has been described as an example. However, the lead terminals 21a to 21d do not have to have the step D, and the lead terminals 21a to 21d are not required. It is sufficient that at least one of the lead terminals has the step D.
- the height p1 from the bottom surface E of the sealing member 50 to the second surface M2 in the first portion N1 and the second surface in the second portion N2 from the bottom surface E of the sealing member 50 are as follows. The description will focus on the case where the relationship between the height p2 up to M2 and the height h1 from the bottom surface E of the sealing member 50 to the highest point of the Hall element 10 has a relationship of p1 ⁇ h1 ⁇ p2. However, p2 ⁇ h1 may be sufficient. Even if p2 ⁇ h1, the step D is effective for preventing collet contact.
- the step D is particularly effective for preventing collet contact.
- p2 is 0.05 mm to 0.20 mm
- h1 is 0.05 mm to 0.20 mm
- p1 is 0.02 mm to 0.15 mm, for example.
- the case where the heights h1 from the bottom surface E of the sealing member 50 to the first connection point a are all equal in each of the electrode portions 13a to 13d has been described as an example.
- the height h1 from the bottom surface E to the first connection point a may be different in the electrode portions 13a to 13d.
- the height h2 from the bottom surface E of the sealing member 50 to the second connection point b may be different for each lead terminal 21a to 21d.
- FIG. 5 is a cross-sectional configuration diagram for explaining the Hall sensor according to the present invention.
- the base material 30 is described because it is a Hall element arrangement process in the Hall sensor manufacturing method described later, the base material 30 is removed during the exposure process of exposing the first surfaces M1 of the lead terminals 21a to 21d.
- the hall element 10 has the bottom surface of the sealing member 50 as a reference plane M, and the highest point T of the hall element 10 is higher than the second face M2 in the first part N1 of the lead terminal, and in the second part N2. It arrange
- a height t from the bottom surface E of the sealing member 50 to the highest point T of the Hall element 10 a height p1 from the bottom surface E of the sealing member 50 to the second surface M2 in the first portion N1
- the height p2 from the bottom surface E of the sealing member 50 to the second surface M2 in the second portion N2 has a relationship of p1 ⁇ t ⁇ p2.
- the plurality of lead terminals 21a to 21d include first to fourth lead terminals, and the first to fourth lead terminals include an imaginary straight line connecting the first lead terminal and the third lead terminal and the first lead terminal.
- the virtual straight lines connecting the two lead terminals and the fourth lead terminal are arranged so as to intersect in plan view.
- the Hall element 10 has a rectangular shape in plan view, and the Hall element 10 has four vertices in the plan view in the region between the first lead terminal and the second lead terminal. At a position arranged in a region between the lead terminal and the third lead terminal, a region between the third lead terminal and the fourth lead terminal, and a region between the fourth lead terminal and the first lead terminal. Has been placed.
- an insulating layer 40 is provided on a surface opposite to the surface on which the plurality of electrode portions 13 a to 13 d of the Hall element 10 are disposed, and the insulating layer 40 is exposed from the bottom surface E of the sealing member 50. ing.
- Each lead terminal has a step D on the second surface M2, and each lead terminal has a first portion N1 on the side closer to the Hall element 10 with the step D as a boundary.
- the height p1 from the first portion N1 of each lead terminal to the second surface M2 with the second portion N2 on the far side and the bottom surface E of the sealing member 50 as the reference plane M is the second portion. It is formed lower than the height p2 up to the second surface M2 in N2. That is, the height p1 from the bottom surface E of the sealing member 50 to the second surface M2 in the first portion N1, and the height p2 from the bottom surface E of the sealing member 50 to the second surface M2 in the second portion N2. And p1 ⁇ p2.
- the dimensions of the Hall sensor 100 are, for example, a length of 0.2 mm to 0.6 mm, a width of 0.4 mm to 1.2 mm, and a thickness of 0.1 mm to 0.3 mm.
- FIG. 6A and 6B are views showing a metal plate used for manufacturing the Hall sensor of the first embodiment.
- 6A is a front view
- FIG. 6B is a back view.
- the metal plate 120 has a structure in which portions serving as lead terminals of the hall sensors are connected.
- symbol H indicates a hole
- the hatched portion indicates a half-etched region.
- a region surrounded by a dotted line is a region used by one Hall sensor, and a region between the dotted lines is a region B (kerf width) through which dicing teeth pass during dicing.
- the Hall sensor manufacturing method of Embodiment 1 includes a plurality of lead terminals 21a to 21d, a Hall element 10 having a plurality of electrode portions 13a to 13d, each lead terminal of the plurality of lead terminals 21a to 21d, and a plurality of electrodes.
- a method of manufacturing a Hall sensor comprising a plurality of conducting wires 31a to 31d that electrically connect the electrode portions of the portions 13a to 13d, respectively, wherein the metal plate 120 on which the plurality of lead terminals 21a to 21d are formed is a base material
- a connecting step of electrically connecting the lead wires 31a to 31d, the Hall element 10, the plurality of lead wires 31a to 31d, and each lead end A sealing step of sealing the second surface M2, which is a surface connected to the lead wire, with a sealing member, and removing the base material, the first surface on the opposite side of the second surface M2 of each lead terminal
- the plurality of lead terminals include at least a first lead terminal, and the first lead terminal is centered on a position where the Hall element 10 is placed on the second surface M2 and in plan view.
- a step D is formed on the circumference of the elliptical or polygonal region, and the first lead terminal has the first portion N1 on the side close to the position where the Hall element 10 is placed with the step D as a boundary.
- the second element N2 is provided on the side far from the position where the Hall element 10 is placed, and the first lead terminal has the metal plate 120 of the base when the metal plate is disposed on the base.
- the height p1 up to the second surface M2 in the first part N1 is lower than the height p2 up to the second face M2 in the second part N2 with the surface to be arranged as the reference plane M. That is, the height p1 up to the second surface M2 in the first part N1 and the height p2 up to the second surface M2 in the second part N2 have a relationship of p1 ⁇ p2.
- the first lead terminal has a step D on the periphery of an elliptical region centered on the position where the Hall element 10 is placed in plan view. Further, the lead terminal has a step D on a circumference centered on a position where the Hall element 10 is placed in a plan view. The first lead terminal has a step D on the second surface M2 and at a position corresponding to the shape of the tip of the collet centered on the position where the Hall element 10 is placed in plan view. The terminal has a first portion N1 on the side near the position where the Hall element 10 is placed, with the step D as a boundary, and a second portion N2 on the side far from the position where the Hall element 10 is placed.
- the height p1 to the second surface M2 of the first portion N1 of the lead terminal is the second surface of the second portion N2 with the surface on which the metal plate 120 of the substrate 30 is disposed as the reference surface M. It is formed lower than the height p2 up to M2.
- the surface of the base material 30 on which the metal plate 120 is arranged is defined as the reference plane M, and the hall element 10 is the highest point T of the hall element 10 at the first of the lead terminals 21a to 21d.
- the hall element arrangement step may include a step of arranging the highest point T of the hall element 10 at a position higher than the second surface M2 in the second portion N2. Even if p2 ⁇ T, the step D is effective in preventing collet contact.
- the step D is particularly effective for preventing collet contact.
- the plurality of lead terminals 21a to 21d include first to fourth lead terminals, and the first to fourth lead terminals include an imaginary straight line connecting the first lead terminal and the third lead terminal and the first lead terminal.
- An imaginary straight line connecting the two lead terminals and the fourth lead terminal is arranged so as to intersect in plan view
- the Hall element 10 is rectangular in plan view
- the Hall element arrangement step is in plan view
- the four vertices of the Hall element 10 are the region between the first lead terminal and the second lead terminal, the region between the second lead terminal and the third lead terminal, the third lead terminal and the fourth lead terminal.
- a step of disposing the Hall element so as to be disposed in a region between the lead terminals and a region between the fourth lead terminal and the first lead terminal.
- an insulating layer forming step of forming the insulating layer 40 between the base material 30 and the Hall element 10 is included, and the exposing step includes a step of exposing the insulating layer 40 from the sealing member 50.
- Each lead terminal of the plurality of lead terminals has a step D on the second surface, and each lead terminal has a first step on the side closer to the position where the Hall element 10 is placed with the step D as a boundary. It has the part N1, has the second part N2 on the side far from the position where the Hall element 10 is placed, and each lead terminal is a metal of the base material 30 when the metal plate is arranged on the base material.
- the height p1 of each lead terminal to the second surface M2 in the first portion N1 is higher than the height p2 to the second surface M2 in the second portion N2. Is also formed low.
- 7A to 7E are plan views showing the steps of the Hall sensor manufacturing method.
- 7A to 7E a region between dotted lines is a region B (kerf width) through which dicing teeth pass during dicing.
- FIG. 7A first, the metal plate 120 on which the lead terminals described above are formed is prepared.
- the metal plate 120 has a structure in which a plurality of lead terminals 21a to 21d shown in FIG. 2B are connected in the vertical direction and the horizontal direction in plan view.
- the material of the metal plate 120 is, for example, copper.
- one surface of the heat-resistant film 80 is pasted on the back side of the metal plate 120 as a base material.
- an insulating adhesive layer is applied to one surface of the heat resistant film 80.
- the adhesive layer is based on, for example, a silicone resin as a component. This adhesive layer makes it easy to attach the metal plate 120 to the heat resistant film 80.
- the penetrating region penetrating the metal plate 120 is closed with the heat resistant film 80 from the back surface side.
- the heat resistant film 80 which is a base material
- the resin-made tape which has adhesiveness and has heat resistance.
- about adhesiveness the one where the paste thickness of the adhesion layer is thinner is preferable.
- heat resistance it is necessary to withstand temperatures of about 150 ° C. to 200 ° C.
- a polyimide tape can be used as such a heat resistant film 80.
- the polyimide tape has heat resistance that can withstand about 280 ° C.
- Such a polyimide tape having high heat resistance can withstand high heat applied during subsequent molding or wire bonding.
- the following tape may be used as the heat resistant film 80.
- Polyester tape heat-resistant temperature, about 130 ° C (however, the heat-resistant temperature reaches about 200 ° C depending on the use conditions)
- Teflon (registered trademark) tape heat-resistant temperature: about 180 ° C
- PPS polyphenylene sulfide
- Glass cloth heat-resistant temperature: about 200 ° C (5)
- Nomek paper heat-resistant temperature: about 150-200 ° C (6)
- aramid and crepe paper can be used as the heat resistant film 80.
- an insulating paste is applied to the area surrounded by the lead terminals 21a to 21d on the surface of the heat resistant film 80 having the adhesive layer.
- the application conditions of the insulating paste for example, the range to be applied and the application
- the Hall element 10 is placed in a region of the heat resistant film 80 where the insulating paste is applied (that is, die bonding is performed).
- heat treatment that is, curing
- the insulating paste is cured to form the insulating layer 40.
- FIG.7 (e) is a reverse view of FIG.7 (d). Then, the whole is sealed with the mold resin 50 (that is, resin sealing is performed). This resin sealing is performed using, for example, a transfer mold technique.
- FIGS. 8A to 8D are cross-sectional views showing the steps of the Hall sensor manufacturing method.
- a mold die 90 including a lower die 91 and an upper die 92 is prepared, and a metal plate 120 after wire bonding is disposed in the cavity of the mold die 90.
- the mold resin 50 heated and melted is injected into the surface of the heat resistant film 80 on the side having the adhesive layer 130 (that is, the surface bonded to the metal plate 120) and filled.
- the Hall element 10 at least the surface side of the metal plate 120, and the conducting wires 31a to 31d are resin-sealed.
- the mold resin 50 is taken out from the mold.
- the heat resistant film 80 is peeled from the insulating layer 40 and the mold resin 50.
- the heat resistant film 80 is peeled from the insulating layer 40 and the mold resin 50 while leaving the insulating layer 40 on the back surface of the Hall element 10.
- exterior plating is applied to the surface of the metal plate 120 exposed from the mold resin 50 (at least the back surface exposed from the mold resin 50 of each lead terminal 21a to 21d).
- exterior plating layers 60a to 60d are formed.
- a dicing tape 93 is affixed to the upper surface of the mold resin 50 (ie, the surface opposite to the surface having the exterior plating layers 60a to 60d of the Hall sensor 100). Then, for example, the blade is moved relative to the metal plate 120 along the virtual two-dot chain line shown in FIG. 7E to cut the mold resin 50 and the metal plate 120 (that is, dicing). I do). That is, the mold resin 50 and the metal plate 120 are diced for each of the plurality of Hall elements 10 and separated into individual pieces. The diced metal plate 120 becomes the lead terminals 21a to 21d.
- the insulating layer 40 is not limited to the insulating paste.
- a die attach film that is, an adhesive layer of a dicing / die bonding integrated film may be used.
- Such a configuration provides the following effects. That is, the adhesive layer of the die attach film is used as an insulating layer that covers the back surface of the Hall element 10. Thereby, since the application
- the lens module of the present embodiment includes a Hall sensor, a lens holder to which a magnet is attached, and a drive coil that moves the magnet based on a Hall electromotive force signal that is an output signal from an external terminal of the Hall sensor. .
- the Hall sensor of the present embodiment is thin and small and has a small variation in magnetic characteristics, so that it can accurately detect a magnetic field. Therefore, the lens module can be reduced in size, and accurate position detection can be performed.
- the magnetic field of the magnet attached to the lens holder is detected by the Hall sensor of the present embodiment, and based on the detected output signal, a driving current is passed through the driving coil to perform autofocus control and camera shake correction control with high accuracy. be able to.
- the Hall sensor of the present embodiment is thin and downsized, the Hall element inside the Hall sensor and the magnet can be brought closer to each other, and more accurate magnetic detection is possible.
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Abstract
Description
(1);複数の電極部を有するホール素子と、前記ホール素子の周囲に配置された複数の外部端子と、前記複数の電極部の各電極部と前記複数の外部端子の各外部端子とをそれぞれ電気的に接続する複数の導線と、前記ホール素子と、前記複数の導線と、前記各外部端子の前記導線と接続している面である第2面とを封止する封止部材と、を備え、前記各外部端子の前記第2面とは反対側の第1面は、前記封止部材の底面から露出しており、前記複数の外部端子は、第1の外部端子を少なくとも含み、前記第1の外部端子は、前記第2面上で、かつ、平面視で、前記ホール素子を囲む領域の周上に段差を有し、前記第1の外部端子は、前記段差を境に、前記ホール素子に近い側に第1の部位を有し、前記ホール素子に遠い側に第2の部位を有し、前記封止部材の底面を基準面として、前記第1の外部端子の前記第1の部位における前記第2面までの高さは、前記第2の部位における前記第2面までの高さよりも低く形成されているホールセンサである。
(3);(1)又は(2)において、前記ホール素子は、前記基準面から前記ホール素子の最も高い点までの高さをT、前記基準面から前記第2の部位における前記第2面の高さをp2として、p2<T<1.5×p2となる位置に配置される。
(4);(1)~(3)のいずれかにおいて、前記複数の外部端子は、第2乃至第4の外部端子を更に含み、前記第1乃至第4の外部端子は、前記第1の外部端子と前記第3の外部端子とを結ぶ仮想直線と前記第2の外部端子と前記第4の外部端子とを結ぶ仮想直線が平面視で交差するように配置されており、前記ホール素子は、平面視で矩形状であり、平面視で、前記ホール素子の4つの頂点が、前記第1の外部端子と前記第2の外部端子の間の領域、前記第2の外部端子と前記第3の外部端子の間の領域、前記第3の外部端子と前記第4の外部端子の間の領域及び前記第4の外部端子と前記第1の外部端子の間の領域に配置される位置に配置されている。
(6);(1)~(5)のいずれかにおいて、前記複数の外部端子の各外部端子は、前記第2面上に前記段差を有し、前記各外部端子は、前記段差を境に、前記ホール素子に近い側に前記第1の部位を有し、前記ホール素子に遠い側に前記第2の部位を有し、前記封止部材の底面を基準面として、前記各外部端子の前記第1の部位における前記第2面までの高さは、前記第2の部位における前記第2面までの高さよりも低く形成されている。
(7);(6)において、各外部端子は、平面視で、前記ホール素子を中心とした円形状、多角形状、又は、それらの組み合わせの形状の領域の周上に、前記段差が形成されている。
(10);(8)又は(9)において、前記段差は、断面視で、斜面形状、又は、封止部材の底面側に凹む曲線形状を有する。
(11);(8)~(10)のいずれかにおいて、前記各外部端子は、平面視で、前記ホール素子を中心とした、円形状、多角形状、又は、それらの組み合わせの形状の領域の周上に前記段差が形成される。
(13);(1)~(12)のいずれかに記載のホールセンサと、磁石が取り付けられたレンズホルダと、前記ホールセンサの前記外部端子からの出力信号に基づいて、前記磁石を移動させる駆動コイルと、を備えるレンズモジュールである。
(17);(14)~(16)のいずれかにおいて、前記ホール素子配置工程は、前記基準面から前記ホール素子の最も高い点までの高さをT、前記基準面から前記第2の部位における前記第2面の高さをp2として、前記ホール素子を、p2<T<1.5×p2となる位置に配置する工程を含む。
(20);(14)~(19)のいずれかにおいて、前記複数の外部端子の各外部端子は、前記第2面上に前記段差を有し、前記各外部端子は、前記段差を境に、前記ホール素子が載置される位置に近い側に前記第1の部位を有し、前記ホール素子が載置される位置に遠い側に前記第2の部位を有し、前記各外部端子は、前記金属板を前記基材上に配置したときに、前記基材の前記金属板が配置される面を基準面として、前記各外部端子の前記第1の部位における前記第2面までの高さが、前記第2の部位における前記第2面までの高さよりも低く形成されている。
以下、図面を参照して本発明の各実施形態について説明する。
(構成)
図2(a)乃至(c)は、本発明に係るホールセンサの実施形態1を説明するための構成図で、図2(a)は図2(b)におけるA-A線断面図、図2(b)は図2(a)の平面図、図2(c)は図2(a)の底面図、図3は図2(a)乃至(c)に示したホールセンサの全体斜視図を示している。なお、Gaは表面のハーフエッチング、Gbは裏面のハーフエッチングの施された部分を示している。
ホール素子10は、基板11と、この基板11上(又は基板11内)に設けられた感磁部12と、この感磁部12と接続する複数の電極部13a乃至13dとを有している。なお、図2(a)においては、感磁部12が基板11上に設けられている場合について拡大図で示している。
また、複数のリード端子21a乃至21dは、ホール素子10の周囲、つまり、封止部材50の底面に沿ってホール素子10の四隅を取り囲むようにして配置されている。
また、封止部材50は、ホール素子10と複数のリード端子21a乃至21dと複数の導線31a乃至31dとを覆う。封止部材50としてはモールド樹脂などの樹脂部材が好ましい。
また、各リード端子21a乃至21dは、前記各導線31a乃至31dと接続している第2面M2と、この第2面M2とは反対側の第1面M1とを有し、この第1面M1は、封止部材50の底面Eから露出している。
また、複数のリード端子21a乃至21dは、段差Dを境に、段差Dを有する各リード端子21a乃至21dのホール素子10に近い側に第1の部位N1を有し、ホール素子10に遠い側に第2の部位N2を有し、封止部材50の底面Eから第1の部位N1における第2面M2までの高さp1は、封止部材50の底面Eから第2の部位N2における第2面M2までの高さp2よりも低く構成されている。
本実施形態において、外部端子21a乃至21dは、複数の導線が接続される第2の部位N2から、第2の部位N2よりもホール素子に近い第1の部位N1へ、封止部材の底面Eを基準面とした第2の部位N2における第2面側の高さp2が、封止部材の底面Eを基準面とした第1の部位N1における第2面側の高さp1よりも低くなる段差が形成される。段差は、断面視で、斜面形状、又は、封止部材の底面側に凹む曲線形状を有する形態であることが好ましい。段差Dは、平坦な上面と下面を有し、上面と下面の間が斜面形状、曲線形状、又は、それらの組み合わせであってもよく、上面から斜面形状、曲線形状、又は、それらの組み合わせで外部端子の端部まで到達してもよい。
リード端子21aの第2面M2に複数の段差がある場合は、ホール素子10に最も近い段差を段差Dとし、段差Dを境に、ホール素子10に近い側を第1の部位N1、ホール素子10に遠い側を第2の部位N2とする。リード端子21b乃至21dについても同様である。リード端子21a乃至21dの第2面M2に形成されている段差Dは、封止部材50で封止されている。
封止部材50の底面Eから第1の部位N1における第2面M2までの高さp1と、封止部材50の底面Eから第2の部位N2における第2面M2までの高さp2と、封止部材50の底面Eからホール素子10の最も高い点までの高さh1とは、p1<h1<p2の関係を有している。つまり、封止部材50の底面Eからホール素子の電極部と複数の導線が接触する接触点までの高さh1が、封止部材50の底面Eを基準面とした第1の部位N1における第2面側の高さp1よりも低い。
また、封止部材50の底面Eから各電極部13a乃至13dと各導線31a乃至31dとの第1の接続点aまでの高さh1は、封止部材50の底面Eから各リード端子21a乃至21dと各導線31a乃至31dとの第2の接続点bまでの高さh2よりも低くなるように構成されている。
本実施形態1のホールセンサは、h1<h2の関係を有しているので、ホール素子の基板11のエッジに導線31a乃至31dが接触しにくく、リーク電流が発生しにくい。これにより、薄型で、かつ磁気を正確に検出できるホールセンサを実現することができる。
なお、本実施形態1のホールセンサは、リード端子のエッジと導線の接触が発生しやすい構造となるが、リード端子のエッジタッチに関しては、同電位のリード端子に導線が2カ所接続された状態となるだけであるので、特に問題は無い。
このように、低い方から高い方にワイヤーボンディングするので、ワイヤーがホール素子のエッジに接触しにくくなる。これにより、ホール素子とリード端子の間の距離を短くしてもエッジ接触が起きにくくなる。これにより、ホール素子とリード端子の間の距離を短くすることが可能となり、小型化が可能となる。
あるいは、複数の導線31a乃至31dは、複数のリード端子21a乃至21dの第2の部位N2における第2面M2が第1回目のボンディングであり、複数の電極部13a乃至13dが第2回目のボンディングとなるようにワイヤーボンディングされている。
また、複数の導線31a乃至31dは、複数の電極部13a乃至13dが第1回目のボンディングであり、複数のリード端子21a乃至21dの第1の部位N1における第2面M2が第2回目のボンディングとなるようにワイヤーボンディングしてもよい。
また、複数の導線31a乃至31dは、複数のリード端子21a乃至21dの第1の部位N1における第2面M2が第1回目のボンディングであり、複数の電極部13a乃至13dが第2回目のボンディングとなるようにワイヤーボンディングしてもよい。
また、基板11の複数の電極部13a乃至13dが設けられた面とは反対側の面に設けられた絶縁層40を更に備えている。この絶縁層40は、封止部材50の底面Eから露出している。
絶縁層40は、その成分として、例えば、エポキシ系の熱硬化型樹脂と、フィラーとしてシリカ(SiO2)とを含むことがより好ましい。絶縁層40は、ホール素子10の裏面、つまり、感磁部12を有する面の反対側の面に接しており、この絶縁層40によってホール素子10の裏面が覆われている。ホール素子10の裏面全体が絶縁層40により覆われていることが、リーク電流の発生の抑制の観点から好ましい。絶縁層40のうち、ホール素子10の裏面を覆っている部分の厚さは、フィラーサイズで決まり、例えば、5μm以上である。
リード端子21a乃至21dは、例えば、銅(Cu)などの金属からなる。また、リード端子21a乃至21dは、その面側又は裏面の一部がエッチング(すなわち、ハーフエッチング)されていてもよい。
なお、図示しないが、リード端子21a乃至21dの表面で(図2(a)における上面側)、導線31a乃至31dで接続されるリード端子21a乃至21dの表面には、Agめっきが施されていることが電気的接続の観点から好ましい。
導線31a乃至31dは、ホール素子10が有する電極部13a乃至13dと、リード端子21a乃至21dをそれぞれ電気的に接続する導線であり、例えば、金(Au)からなる。図2(b)に示すように、導線31aは、リード端子21aと電極部13aとを接続し、導線31bはリード端子21bと電極部13bとを接続している。また、導線31cはリード端子21cと電極部13cとを接続し、導線31dは、リード端子21dと電極13dとを接続している。
また、図2(c)に示すように、ホールセンサ100の底面側、つまり、配線基板に実装する側では、各リード端子21a乃至21dの裏面の少なくとも一部と、絶縁層40の少なくとも一部とが、封止部材50からそれぞれ露出している。
このような構成により、ホールセンサ100を用いて磁気(磁界)を検出する場合は、例えば、リード端子21aを電源電位(+)に接続するとともに、リード端子21cを接地電位(GND)に接続して、リード端子21aからリード端子21cに電流を流す。そして、リード端子21b,21d間の電位差V1-V2(ホール出力電圧VH)を測定する。ホール出力電圧VHの大きさから磁界の大きさを検出し、ホール出力電圧VHの正負から磁界の向きを検出する。
すなわち、リード端子21aは、ホール素子10に所定電圧を供給する電源用リード端子である。リード端子21cは、ホール素子10に接地電位を供給する接地用リード端子である。リード端子21b,21dは、ホール素子10のホール起電力信号を取り出す信号取出用リード端子である。
図4(a)及び(b)に示したホールセンサは、コレットとの接触がなるべく少なくなるように設計されたリード端子が用いられており、リード端子の表面がハーフエッチングされている。つまり、コレットが干渉するエリアがハーフエッチングされている。
このような向きにホール素子を配置することで、ホールセンサ全体を小型化することが可能になる。ただし、このようにホール素子を配置すると、ホール素子の載置時にコレットがリード端子に接触しやすくなるので、このようにホール素子を配置する場合、リード端子21a乃至21dの第2面M2に段差Dを設けることは、コレットの接触防止に特に有効である。なお、上記の矩形には正方形が含まれる。
また、本実施形態1では、複数のリード端子21a乃至21dの全てで段差Dを有する場合を例に説明したが、リード端子21a乃至21dが全て段差Dを有する必要は無く、リード端子21a乃至21dのうち少なくとも一つのリード端子が段差Dを有していればよい。
ホール素子10は、封止部材50の底面を基準面Mとして、ホール素子10の最も高い点Tが、リード端子の第1の部位N1における第2面M2よりも高く、第2の部位N2における第2面M2よりも低い位置に配置されている。つまり、封止部材50の底面Eからホール素子10の最も高い点Tまでの高さtと、封止部材50の底面Eから第1の部位N1における第2面M2までの高さp1と、封止部材50の底面Eから第2の部位N2における第2面M2までの高さp2とは、p1<t<p2の関係を有している。
また、ホール素子10の複数の電極部13a乃至13dが配置される面とは反対側の面に配置された絶縁層40を備え、この絶縁層40は、封止部材50の底面Eから露出している。
ホールセンサ100の寸法は、例えば、縦が0.2mm以上0.6mm以下であり、横が0.4mm以上1.2mm以下であり、厚みが0.1mm以上0.3mm以下である。
図6(a)及び(b)は、本実施形態1のホールセンサの製造に使用する金属板を示す図である。図6(a)は表面図、図6(b)は裏面図である。金属板120は各ホールセンサのリード端子となる部分が連なった構造となっている。図中符号Hは穴部を示しており、ハッチング部分はハーフエッチング領域を示している。点線で囲まれた領域は、1つのホールセンサで使用される領域であり、また、点線と点線の間の領域はダイシング時にダイシングの歯が通過する領域B(カーフ幅)である。
第1のリード端子は、第2面M2上で、かつ、平面視で、ホール素子10が載置される位置を中心とするコレットの先端の形状に対応した位置に段差Dを有し、リード端子は、段差Dを境に、ホール素子10が載置される位置に近い側に第1の部位N1を有し、ホール素子10が載置される位置に遠い側に第2の部位N2を有し、基材30の金属板120が配置される面を基準面Mとして、リード端子の第1の部位N1における第2面M2までの高さp1は、第2の部位N2における第2面M2までの高さp2よりも低く形成する。
なお、ホール素子配置工程は、ホール素子10の最も高い点Tが第2の部位N2における第2面M2より高い位置に配置する工程を含んでいてもよい。p2<Tであっても段差Dはコレットの接触防止に有効である。例えば、p2<T<1.5×p2である場合や、p2<T<1.3×p2である場合、p2<T<1.1×p2である場合など、p2とTがあまり変わらない高さの場合に段差Dはコレットの接触防止に特に有効である。
また、複数のリード端子の各リード端子は、第2面上に段差Dを有し、各リード端子は、段差Dを境に、ホール素子10が載置される位置に近い側に第1の部位N1を有し、ホール素子10が載置される位置に遠い側に第2の部位N2を有し、各リード端子は、金属板を基材上に配置したときに、基材30の金属板120が配置される面を基準面Mとして、各リード端子の第1の部位N1における第2面M2までの高さp1は、第2の部位N2における第2面M2までの高さp2よりも低く形成されている。
図7(a)に示すように、まず、上述したリード端子が形成された金属板120を用意する。この金属板120は、図2(b)に示したリード端子21a乃至21dが平面視で縦方向及び横方向に複数繋がっている構造を有している。金属板120の材料は、例えば銅である。
粘着性については、粘着層の糊厚がより薄いほうが好ましい。また、耐熱性については、約150℃~200℃の温度に耐えることが必要とされる。このような耐熱性フィルム80として、例えば、ポリイミドテープを用いていることができる。ポリイミドテープは、約280℃に耐える耐熱性を有している。このような高い耐熱性を有するポリイミドテープは、後のモールドやワイヤーボンディング時に加わる高熱にも耐えることが可能である。また、耐熱性フィルム80としては、ポリイミドテープの他に、以下のテープを用いることも可能である。
(2)テフロン(登録商標)テープ;耐熱温度:約180℃
(3)PPS(ポリフェニレンサルファイド);耐熱温度:約160℃
(4)ガラスクロス;耐熱温度:約200℃
(5)ノーメックペーパー;耐熱温度:約150~200℃
(6)他に、アラミド、クレープ紙が耐熱性フィルム80として利用し得る。
次に、図7(c)に示すように、耐熱性フィルム80のうち、絶縁ペーストが塗布された領域にホール素子10を載置する(すなわち、ダイボンディングを行う)。そして、ボンディング後に熱処理(すなわち、キュア)を行って、絶縁ペーストを硬化させて絶縁層40とする。
次に、図7(d)に示すように、導線31a乃至31dの一端を各リード端子21a乃至21dにそれぞれ接続し、導線31a乃至31dの他端を電極部13a乃至13dにそれぞれ接続する(すなわち、ワイヤーボンディングを行う)。図7(e)は図7(d)の裏面図である。
そして、モールド樹脂50で全体を封止する(すなわち、樹脂封止を行う)。この樹脂封止は、例えば、トランスファーモールド技術を用いて行う。
そして、図8(c)に示すように、金属板120のモールド樹脂50から露出している面(少なくとも、各リード端子21a乃至21dのモールド樹脂50から露出している裏面)に外装めっきを施して、外装めっき層60a乃至60dを形成する。
次に、図8(d)に示すように、モールド樹脂50の上面(すなわち、ホールセンサ100の外装めっき層60a乃至60dを有する面の反対側の面)にダイシングテープ93を貼付する。そして、例えば、図7(e)に示した仮想の2点鎖線に沿って、金属板120に対してブレードを相対的に移動させて、モールド樹脂50及び金属板120を切断する(すなわち、ダイシングを行う)。つまり、モールド樹脂50及び金属板120を複数のホール素子10の各々ごとにダイシングして個片化する。ダイシングされた金属板120は、リード端子21a乃至21dとなる。
以上の工程を経て、図2(a)乃至(c)に示したホールセンサ100が完成する。
以下に、実施形態2について説明する。上述した本実施形態1においては、ホール素子10の裏面を覆う絶縁層40として、絶縁ペーストを用いる場合について説明した。しかしながら、本実施形態2において、絶縁層40は、絶縁ペーストに限定されるものではない。絶縁層40として、例えば、ダイアタッチフィルム、つまり、ダイシング・ダイボンディング一体型フィルムの粘着層を用いてもよい。
このような構成により、以下のような効果を奏する。つまり、ホール素子10の裏面を覆う絶縁層として、ダイアタッチフィルムの粘着層を用いる。これにより、絶縁ペーストの塗布工程を省くことができるので、工程数の削減に寄与することができる。
本実施形態のレンズモジュールは、ホールセンサと、磁石が取り付けられたレンズホルダと、ホールセンサの外部端子からの出力信号であるホール起電力信号に基づいて、磁石を移動させる駆動コイルと、を備える。本実施形態のホールセンサは、薄型・小型で、かつ、磁気特性のバラツキが小さいため磁場を正確に検出することができる。そのため、レンズモジュールを小型化することができ、また、正確な位置検出を行うことが可能となる。レンズホルダに取り付けられた磁石の磁場を、本実施形態のホールセンサで検知し、検知した出力信号に基づいて、駆動コイルに駆動電流を流すことにより、オートフォーカス制御や手振れ補正制御を精度良く行うことができる。また、本実施形態のホールセンサは、薄型化・小型化しているため、ホールセンサ内部のホール素子と、磁石との位置を近づけることが可能となり、より精度のよい磁気検知が可能である。
11 基板
12 感磁部
13a乃至13d 電極部
21a乃至21d リード端子
30 基材
31a乃至31d 導線
40 絶縁層
50 封止部材
60a乃至60d 外装めっき層
80 耐熱性フィルム
90 モールド金型
91 下金型
92 上金型
93 ダイシングテープ
100 ホールセンサ
120 金属板
130 粘着層
510 ホール素子
512 感磁部
513a,513b 電極部
525,527 リード端子
530 基材
540 絶縁層
600 コレット
Claims (20)
- 複数の電極部を有するホール素子と、
前記ホール素子の周囲に配置された複数の外部端子と、
前記複数の電極部の各電極部と前記複数の外部端子の各外部端子とをそれぞれ電気的に接続する複数の導線と、
前記ホール素子と、前記複数の導線と、前記各外部端子の前記導線と接続している面である第2面とを封止する封止部材と、を備え、
前記各外部端子の前記第2面とは反対側の第1面は、前記封止部材の底面から露出しており、
前記複数の外部端子は、第1の外部端子を少なくとも含み、
前記第1の外部端子は、前記第2面上で、かつ、平面視で、前記ホール素子を囲む領域の周上に段差を有し、
前記第1の外部端子は、前記段差を境に、前記ホール素子に近い側に第1の部位を有し、前記ホール素子に遠い側に第2の部位を有し、
前記封止部材の底面を基準面として、前記第1の外部端子の前記第1の部位における前記第2面までの高さは、前記第2の部位における前記第2面までの高さよりも低く形成されているホールセンサ。 - 前記ホール素子は、前記封止部材の底面を基準面として、前記ホール素子の最も高い点が、前記第1の外部端子の前記第1の部位における前記第2面よりも高く、前記第2の部位における前記第2面よりも低い位置に配置される請求項1に記載のホールセンサ。
- 前記ホール素子は、前記基準面から前記ホール素子の最も高い点までの高さをT、前記基準面から前記第2の部位における前記第2面の高さをp2として、p2<T<1.5×p2となる位置に配置される請求項1又は2に記載のホールセンサ。
- 前記複数の外部端子は、第2乃至第4の外部端子を更に含み、
前記第1乃至第4の外部端子は、前記第1の外部端子と前記第3の外部端子とを結ぶ仮想直線と前記第2の外部端子と前記第4の外部端子とを結ぶ仮想直線が平面視で交差するように配置されており、
前記ホール素子は、平面視で矩形状であり、平面視で、前記ホール素子の4つの頂点が、前記第1の外部端子と前記第2の外部端子の間の領域、前記第2の外部端子と前記第3の外部端子の間の領域、前記第3の外部端子と前記第4の外部端子の間の領域及び前記第4の外部端子と前記第1の外部端子の間の領域に配置される位置に配置されている請求項1~3のいずれか1項に記載のホールセンサ。 - 前記ホール素子の前記複数の電極部が配置される面とは反対側の面に配置された絶縁層を備え、前記絶縁層は、前記封止部材の前記底面から露出している請求項1~4のいずれか1項に記載のホールセンサ。
- 前記複数の外部端子の各外部端子は、前記第2面上に前記段差を有し、
前記各外部端子は、前記段差を境に、前記ホール素子に近い側に前記第1の部位を有し、前記ホール素子に遠い側に前記第2の部位を有し、
前記封止部材の底面を基準面として、前記各外部端子の前記第1の部位における前記第2面までの高さは、前記第2の部位における前記第2面までの高さよりも低く形成されている請求項1~5のいずれか1項に記載のホールセンサ。 - 前記各外部端子は、平面視で、前記ホール素子を中心とした円形状、多角形状、又は、それらの組み合わせの形状の領域の周上に、前記段差が形成される請求項6に記載のホールセンサ。
- 複数の電極部を有するホール素子と、
前記ホール素子の周囲に配置された複数の外部端子と、
前記複数の電極部の各電極部と前記複数の外部端子の各外部端子とをそれぞれ電気的に接続する複数の導線と、
前記ホール素子、前記複数の導線、及び、前記各外部端子の前記導線と接続している面である第2面を封止する封止部材と、を備え、
前記各外部端子の前記第2面とは反対側の第1面は、前記封止部材の底面から露出しており、
前記各外部端子は、前記複数の導線が接続される第2の部位から、前記第2の部位よりも前記ホール素子に近い第1の部位へ、前記封止部材の底面を基準面とした前記第2の部位における第2面側の高さが、前記封止部材の底面を基準面とした前記第1の部位における第2面側の高さよりも低くなる段差が形成されるホールセンサ。 - 前記封止部材の底面から前記ホール素子の前記電極部と前記複数の導線が接触する接触点までの高さが、前記封止部材の底面を基準面とした前記第1の部位における第2面側の高さよりも低い請求項8に記載のホールセンサ。
- 前記段差は、断面視で、斜面形状、又は、封止部材の底面側に凹む曲線形状を有する請求項8又は9に記載のホールセンサ。
- 前記各外部端子は、平面視で、前記ホール素子を中心とした、円形状、多角形状、又は、それらの組み合わせの形状の領域の周上に、前記段差が形成される請求項8~10のいずれか1項に記載のホールセンサ。
- 前記ホール素子は、基板、前記基板上又は基板内に設けられた感磁部、前記感磁部と接続する前記複数の電極部を有し、
前記ホール素子の前記複数の電極部が配置される面とは反対側の面に配置された絶縁層を備え、
前記絶縁層は、前記封止部材の前記底面から露出している請求項8~11のいずれか1項に記載のホールセンサ。 - 請求項1~12のいずれか1項に記載のホールセンサと、
磁石が取り付けられたレンズホルダと、
前記ホールセンサの前記外部端子からの出力信号に基づいて、前記磁石を移動させる駆動コイルと、
を備えるレンズモジュール。 - 複数の外部端子と、複数の電極部を有するホール素子と、前記複数の外部端子の各外部端子と前記複数の電極部の各電極部をそれぞれ電気的に接続する複数の導線とを備えるホールセンサの製造方法であって、
前記複数の外部端子が形成された金属板を基材上に配置する外部端子配置工程と、
前記複数の外部端子で囲まれる領域に前記ホール素子を配置するホール素子配置工程と、
前記複数の電極部と前記複数の外部端子とを前記複数の導線で電気的に接続する導線接続工程と、
前記ホール素子と、前記複数の導線と、前記各外部端子の前記導線と接続している面である第2面とを封止部材で封止する封止工程と、
前記基材を除去し、前記各外部端子の前記第2面とは反対側の第1面を前記封止部材から露出させる露出工程と、を備え、
前記複数の外部端子は、第1の外部端子を少なくとも含み、
前記第1の外部端子は、前記第2面上で、かつ、平面視で、前記ホール素子が載置される位置を中心とした楕円形状又は多角形状の領域の周上に段差を有し、
前記第1の外部端子は、前記段差を境に、前記ホール素子が載置される位置に近い側に第1の部位を有し、前記ホール素子が載置される位置に遠い側に第2の部位を有し、
前記第1の外部端子は、前記金属板を前記基材上に配置したときに、前記基材の前記金属板が配置される面を基準面として、前記第1の部位における前記第2面までの高さが、前記第2の部位における前記第2面までの高さよりも低く形成されているホールセンサの製造方法。 - 複数の外部端子と、複数の電極部を有するホール素子と、前記複数の外部端子の各外部端子と前記複数の電極部の各電極部をそれぞれ電気的に接続する複数の導線とを備えるホールセンサの製造方法であって、
前記複数の外部端子が形成された金属板を基材上に配置する外部端子配置工程と、
前記複数の外部端子で囲まれる領域に前記ホール素子を配置するホール素子配置工程と、
前記複数の電極部と前記複数の外部端子とを前記複数の導線で電気的に接続する導線接続工程と、
前記ホール素子と、前記複数の導線と、前記各外部端子の前記導線と接続している面である第2面とを封止部材で封止する封止工程と、
前記基材を除去し、前記各外部端子の前記第2面とは反対側の第1面を前記封止部材から露出させる露出工程と、を備え、
前記複数の外部端子は、第1の外部端子を少なくとも含み、
前記第1の外部端子は、前記第2面上で、かつ、平面視で、前記ホール素子が載置される位置を中心とするコレットの先端の形状に対応した位置に段差を有し、
前記第1の外部端子は、前記段差を境に、前記ホール素子が載置される位置に近い側に第1の部位を有し、前記ホール素子が載置される位置に遠い側に第2の部位を有し、
前記第1の外部端子は、前記金属板を前記基材上に配置したときに、前記基材の前記金属板が配置される面を基準面として、前記第1の部位における前記第2面までの高さが、前記第2の部位における前記第2面までの高さよりも低く形成されているホールセンサの製造方法。 - 前記ホール素子配置工程は、前記基材の前記金属板が配置される面を基準面として、前記ホール素子を、前記ホール素子の最も高い点が、前記第1の外部端子の前記第1の部位における前記第2面よりも高く、前記第2の部位における前記第2面よりも低くなる位置に配置する工程を含む請求項14又は15に記載のホールセンサの製造方法。
- 前記ホール素子配置工程は、前記基準面から前記ホール素子の最も高い点までの高さをT、前記基準面から前記第2の部位における前記第2面の高さをp2として、前記ホール素子を、p2<T<1.5×p2となる位置に配置する工程を含む請求項14~16のいずれかに1項に記載のホールセンサの製造方法。
- 前記複数の外部端子は、第2乃至第4の外部端子を更に含み、
前記第1乃至第4の外部端子は、前記第1の外部端子と前記第3の外部端子とを結ぶ仮想直線と前記第2の外部端子と前記第4の外部端子とを結ぶ仮想直線が平面視で交差するように配置されており、
前記ホール素子は平面視で矩形状であり、
前記ホール素子配置工程は、
平面視で、前記ホール素子の4つの頂点が、前記第1の外部端子と前記第2の外部端子の間の領域、前記第2の外部端子と前記第3の外部端子の間の領域、前記第3の外部端子と前記第4の外部端子の間の領域及び前記第4の外部端子と前記第1の外部端子の間の領域に配置されるように前記ホール素子を配置する工程を含む請求項14~17のいずれかに1項に記載のホールセンサの製造方法。 - 前記基材と前記ホール素子の間に絶縁層を形成する絶縁層形成工程を含み、前記露出工程は、前記絶縁層を前記封止部材から露出させる工程を含む請求項14~18のいずれかに1項に記載のホールセンサの製造方法。
- 前記複数の外部端子の各外部端子は、前記第2面上に前記段差を有し、
前記各外部端子は、前記段差を境に、前記ホール素子が載置される位置に近い側に前記第1の部位を有し、前記ホール素子が載置される位置に遠い側に前記第2の部位を有し、
前記各外部端子は、前記金属板を前記基材上に配置したときに、前記基材の前記金属板が配置される面を基準面として、前記各外部端子の前記第1の部位における前記第2面までの高さが、前記第2の部位における前記第2面までの高さよりも低く形成されている請求項14~19のいずれか1項に記載のホールセンサの製造方法。
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