JP5469235B2 - Lens module manufacturing method - Google Patents

Description

  The present invention relates to a lens module manufacturing method and the like.

  In recent years, camera modules have been mounted on portable electronic devices such as mobile phones and portable computers, and so-called wafer level camera modules have been proposed.

  As such a wafer level camera module, Patent Document 1 discloses a camera module configured by a solid-state imaging device chip having a wafer level, a chip size, and a package structure and a cylindrical outer frame covering the periphery of the solid-state imaging device chip. It is disclosed. In the camera module, a lens barrel holding a plurality of lenses focused on a light receiving surface of a solid-state image sensor chip is screwed and fixed to one end of an outer frame body, and a flush end surface of the solid-state image sensor chip is connected to the other end. It is mated. Then, the optical axis of the lens is fixed vertically to the center of the light receiving surface of the solid-state image sensor chip, so that the optical axis shift when the solid-state image sensor chip is attached to the lens barrel is minimized.

JP 2008-166939 A

  However, camera modules used in electronic devices such as mobile phones are required to be further miniaturized and to have higher performance such as functions such as zoom and autofocus as the electronic devices become smaller. For example, not only the intra-group eccentricity in the lens unit but also the inter-lens eccentricity between the lens units in a camera module including a plurality of lens units does not occur. Required. In addition to downsizing and higher performance of the camera module, there is a demand for cost and labor reduction including the manufacturing process.

  According to some aspects of the present invention, a highly accurate lens module and camera module can be efficiently manufactured.

  The invention according to claim 1 is a method of manufacturing a lens module including at least one lens unit movable in the optical axis direction, and a lens substrate forming step of forming a lens substrate having a plurality of lenses formed on the substrate. And a thickness adding step of adding a thickness in the optical axis direction to the peripheral portion of each lens formed on the lens substrate.

  According to the first aspect of the present invention, the thickness of the lens unit in the optical axis direction can be ensured even when the lens substrate is thinned. For this reason, when the lens unit is moved in the optical axis direction, the lens unit is not twisted, and the occurrence of decentering between the lens units can be suppressed.

  At this time, in the invention described in claim 2, in the thickness adding step, a spacer having an opening formed in a portion in contact with the lens and the lens substrate may be laminated.

  In this way, since the thickness of the lens unit in the optical axis direction can be secured, it is possible to prevent the lens unit from rattling or the lens from being distorted when the lens unit is moved in the optical axis direction.

  In the invention according to claim 3, the lens module may form the lens unit by cutting a plurality of the lens substrates stacked via at least one spacer for each lens.

  Even in this case, the thickness of the lens unit in the optical axis direction can be secured.

  In a fourth aspect of the invention, the lens substrate and the spacer may be bonded and fixed to each other.

  In the invention described in claim 5, the distance between the lens substrate and the spacer in the optical axis direction may be made variable by not bonding the lens substrate and the spacer.

  In the invention according to claim 6, the lens module includes a first lens substrate and a second lens substrate, and the first lens substrate and the second lens substrate are not bonded. The distance in the optical axis direction between the first lens substrate and the second lens substrate may be variable.

  According to a seventh aspect of the present invention, the lens module includes a first spacer and a second spacer, and the first spacer and the second spacer are not adhered to each other so that the first spacer is not bonded. The distance between the spacer and the second spacer in the optical axis direction may be variable.

  According to invention of Claim 4-7, the lens module containing the some lens unit which can move to an optical axis direction can be manufactured more efficiently and easily.

  In the invention according to claim 8, the spacer may be formed to have a diaphragm function.

  In this way, the lens module can be easily provided with a diaphragm function.

  In the invention according to claim 9, in the thickness adding step, a sleeve portion for adding a thickness in the optical axis direction of the peripheral portion of each lens may be formed on the peripheral portion of each lens.

  Even in this case, the thickness of the lens unit in the optical axis direction can be secured.

  In the invention according to claim 10, a through-hole forming step of forming at least one through-hole penetrating a peripheral edge of each lens with the thickness added in the optical axis direction, and an axis in the through-hole And a shaft portion insertion step of inserting the portion.

  In this way, it is possible to efficiently manufacture a lens unit that can move in the optical axis direction.

  In the invention according to claim 11, in the through-hole forming step, at least two through-holes that penetrate the peripheral portion of each lens in the optical axis direction are formed, and among the at least two through-holes One of these may be formed in a long hole shape.

  In this way, when a lens module is manufactured by laminating lens substrates and dividing them into optical elements, it is possible to prevent the optical elements from being installed in the reverse direction by mistake.

  In the invention described in claim 12, after the shaft portion insertion step, a cutting step of dividing each of the plurality of lenses formed on the lens substrate, and after the cutting step, the lens unit is moved in the optical axis direction. An assembly step of assembling the lens module by moving the lens module.

  In this way, it becomes possible to efficiently manufacture a plurality of accurate lens units.

  The invention according to claim 13 is a lens module including at least one lens unit movable in the optical axis direction, wherein the lens unit is formed from a lens substrate having a plurality of lenses formed on a substrate. A lens comprising: an optical element formed by cutting each lens of the lens; and a spacer or a sleeve portion provided to add a thickness in the optical axis direction of the peripheral edge of each lens of the optical element. Related to modules.

  According to the thirteenth aspect of the invention, since the thickness of the lens unit in the optical axis direction can be ensured, the lens is less likely to shake with respect to the optical axis direction when the lens unit is moved in the optical axis direction. It can suppress that the lens of a unit decenters with respect to an optical axis direction.

  In this case, the invention according to claim 14 may include at least one through-hole penetrating the peripheral edge portion and the spacer or the sleeve portion in the optical axis direction, and a shaft portion through which the through-hole is inserted. Good.

  In this way, when the lens unit is moved in the optical axis direction along the shaft portion, a portion where the lens unit and the shaft portion are fitted can be largely secured in the optical axis direction. Eccentricity with respect to the optical axis direction when moving in the axial direction can be suppressed.

  According to a fifteenth aspect of the present invention, there is provided a camera module including the lens module described above and an image pickup device that converts light imaged by the lens module into an electric signal.

  The invention described in claim 16 relates to an electronic apparatus including the camera module described above.

FIG. 1A is a plan view of a first configuration example of the camera module of the first embodiment, and FIG. 1B is a cross-sectional view taken along line AA in FIG. FIG. 2A is a plan view of a second configuration example of the camera module according to the first embodiment, and FIG. 2B is a cross-sectional view taken along line BB in FIG. 5 is a flowchart showing a method for manufacturing a lens module according to the present embodiment. Schematic explanatory drawing of the lens board | substrate formation process in the manufacturing method of the lens module of 1st Embodiment. Schematic explanatory drawing of the thickness addition process in the manufacturing method of the lens module of the embodiment. The flowchart which shows the thickness addition process of the manufacturing method of the lens module which concerns on this embodiment. Schematic explanatory drawing of the axial part insertion process in the manufacturing method of the lens module of the embodiment. Schematic explanatory drawing of the cutting process in the manufacturing method of the lens module of the embodiment. Schematic explanatory drawing of the assembly process in the manufacturing method of the lens module of the embodiment. Schematic explanatory drawing of the cutting process of the other aspect in the manufacturing method of the lens module of the embodiment. Sectional drawing of the spacer provided with the aperture_diaphragm | restriction function contained in the lens module of the embodiment. The top view of one Embodiment of an optical element. FIG. 13A and FIG. 13B are schematic explanatory views of a manufacturing method of the lens module of the second embodiment. The perspective view of the electronic device containing the camera module of this embodiment.

  Hereinafter, preferred embodiments of the present invention will be described in detail. The present embodiment described below does not unduly limit the contents of the present invention described in the claims, and all the configurations described in the present embodiment are essential as means for solving the present invention. Not necessarily.

1. 1. First embodiment 1.1. Configuration FIGS. 1A and 1B show a first configuration example of a camera module including a lens module according to the first embodiment of the present invention. FIG. 1A is a plan view of a first configuration example of the camera module of the present embodiment, and FIG. 1B is a cross-sectional view taken along the line AA of FIG.

  As shown in FIG. 1B, the camera module 100 of the first configuration example includes a lens unit 102, an actuator 104, an image sensor 108, an IR cut filter 110, and an imaging lens 112. In the first configuration example, the camera module 100 uses the imaging device 108 to capture the light imaged by the lens module 103 configured such that one lens unit 102 is movable in the optical axis directions D1 and D3 by the actuator 104. To convert it to an electrical signal.

  The image sensor 108 is a CCD, for example, and outputs a signal corresponding to the received light. As shown in FIG. 1B, the image sensor 108 is provided on the circuit board 106, and an IR cut filter 110 for cutting infrared rays is provided between the image sensor 108 and the lens unit 102.

  In the present embodiment, the lens unit 102 included in the lens module 103 is provided by adhering a spacer 118 to the optical element 114 on which the lens 116 is formed in the optical axis direction D1. That is, the spacer 118 is bonded in the optical axis direction D1 so that the optical axis directions D1 and D3 of the peripheral edge 115 of the lens 116 of the optical element 114 have a thickness.

  By adhering the spacer 118 to the optical element 114 in this way, even if the optical element 114 becomes thinner as the camera module 100 becomes smaller, the spacer 118 increases the thickness of the lens unit 102 in the optical axis directions D1 and D3. You can have it. For this reason, the actuator 104 that moves the lens unit 102 in the optical axis directions D1 and D3 can secure a larger portion for supporting the lens unit 102. As a result, the lens unit 102 can be supported by the actuator 104 in a more stable state without causing the lens unit 102 to rattle or twisting the lens 116 of the lens unit 102. The actuator 104 stably supports the lens unit 102 in this way, so that when the lens unit 102 is moved in the optical axis directions D1 and D3 by the actuator 104, the lens unit 102 is relative to the optical axis direction of the imaging lens 112. Since blurring is suppressed, the occurrence of eccentricity with respect to the optical axis directions D1 and D3 can be prevented.

  2A and 2B show a second configuration example of the camera module including the lens module according to the first embodiment of the present invention. FIG. 2A is a plan view of a second configuration example of the camera module of the present embodiment, and FIG. 2B is a cross-sectional view taken along the line BB in FIG.

  As shown in FIG. 2B, the camera module 120 of the second configuration example includes a first lens unit 122, a second lens unit 124, a shaft 126 (shaft portion), an image sensor 108, and an IR cut filter. 110 is included. In the second configuration example, the camera module 120 has two lens units 122 and 124 slidably fitted to the shaft 126. The light imaged by the lens module 123 configured to be movable in the optical axis directions D1 and D3 via the shaft 126 is converted into an electrical signal by the image sensor 108.

  In the present embodiment, in the first lens unit 122, a spacer 136 is provided between the front end side optical element 128 in which the front end side lens 130 is formed and the rear end side optical element 132 in which the rear end side lens 134 is formed. Adhering to the optical axis directions D1 and D3 is provided. That is, the spacer 136 is bonded in the optical axis directions D1 and D3 so that the peripheral portions 129 and 133 of the lenses 130 and 134 of the optical elements 128 and 132 have thicknesses in the optical axis directions D1 and D3. The first lens unit 122 is slidably fitted to the shaft 126 using the spacer 136 as a sleeve portion.

  Similarly, in the second lens unit 124, a spacer 146 is provided between the front end side optical element 138 on which the front end side lens 140 is formed and the rear end side optical element 142 on which the rear end side lens 144 is formed. Are adhered in the optical axis directions D1 and D3. That is, the thickness in the optical axis directions D1 and D3 of the peripheral portions 139 and 143 of the lenses 140 and 144 of the optical elements 138 and 142 is, for example, thicker than at least the lenses 140 and 144 formed on the optical elements 138 and 142. Thus, the spacer 146 is bonded in the optical axis directions D1 and D3. The second lens unit 124 is slidably fitted to the shaft 126 using the spacer 146 as a sleeve portion.

  By adhering the spacers 136, 146 to the optical elements 128, 132, 138, 142 in this way, even if the optical elements 128, 132, 138, 142 become thinner as the camera module 120 becomes smaller, the lens unit 122 , 124 can be made thick in the optical axis directions D1, D3 by the spacers 136, 146. For this reason, a portion where the shaft 126 is fitted to the lens units 122 and 124 can be largely secured in the optical axis directions D1 and D3. Therefore, when the lens units 122 and 124 move in the optical axis directions D1 and D3 via the shaft 126, the lens units 122 and 124 do not move relative to the optical axis directions D1 and D3, and the optical axis directions D1 and D3. Can be prevented from occurring.

1.2. Manufacturing Method FIG. 3 is a flowchart showing a manufacturing method of the lens module according to the present embodiment. In this embodiment, the lens module manufacturing method is mainly used for manufacturing a lens module included in a wafer level camera module. As shown in FIG. 3, a lens substrate forming step S11, a thickness adding step S12, and a shaft portion. It includes an insertion step S13, a cutting step S14, and an assembly step S15.

  FIG. 4 is a schematic explanatory view of the lens substrate forming step S11. In the lens substrate forming step S11, as shown in FIG. 4, a plurality of (for example, several thousand) lenses 152 are formed on a substrate 150 which is an optical wafer made of glass, transparent resin, or the like. In the present embodiment, the lens substrate 150 is formed using, for example, a lithography technique or an etching technique that is common in semiconductor manufacturing. The lens substrate forming step S11 may include a through hole forming step of forming at least one through hole penetrating in the optical axis direction in the peripheral edge portion 153 of each lens 152 formed on the lens substrate 150. That is, before the thickness adding step S12, at least one through hole 154, 156 that penetrates the peripheral edge 153 of each lens 152 in the optical axis directions D1, D3 may be formed by an etching technique or the like.

  FIG. 5 is a schematic explanatory diagram of the thickness adding step S12. In the thickness adding step S12, the peripheral edge is set such that the thickness in the optical axis direction D1 of the peripheral edge portion 153 of each lens 152 formed on the lens substrate 150 in the lens substrate forming step S11 is increased in the optical axis directions D1 and D3. A thickness is added to the portion 153. In the present embodiment, as shown in FIG. 5, the opening 182 is formed in a portion that is substantially the same size as the lens substrate 150, has a predetermined thickness on the lens substrate 150, and contacts the lens 152. By placing the spacer 180 (before cutting), a thickness is added to the peripheral portion 153 of the lens 152.

  Thus, in this embodiment, in order to give thickness to the optical axis directions D1 and D3 of the lens unit, as shown in FIG. 5, in the thickness adding step S12, the lens substrates 150 and 160 and the spacer 170 before cutting are provided. , 180, 190 are laminated. In addition, as long as the thickness is ensured in the optical axis directions D1 and D3, the number of stacked spacers is not limited.

  In the thickness addition step S12, when the distance between the lens 152 of the lens substrate 150 and the lens 162 of the lens substrate 160 is fixed, the distance between the lens substrate 150 and the spacer 180 and between the spacer 180 and the lens substrate 160. Adhesive etc. are applied to and adhered. On the other hand, when both the lenses 152 and 162 can be freely contacted and separated in the optical axis directions D1 and D3, the lens substrate 150 and the spacer 180 or the spacer 180 and the lens substrate 160 are not bonded. Laminate as it is. Hereinafter, the details of the operation of laminating the lens substrate and the spacer in the thickness adding step S12 will be described with reference to the flowchart shown in FIG.

  In the thickness addition step S12, when the first to Nth lens substrates are stacked via at least one spacer, as shown in FIG. It is determined whether or not to move in the axial direction (S61). When fixing the (i + 1) th lens substrate with respect to the i-th lens substrate, an adhesive is applied between the i-th lens substrate and the spacer (S62), and then on the i-th lens substrate. Spacers are stacked (S63). Thereafter, an adhesive is applied between the spacer laminated on the i-th lens substrate and the i + 1-th lens substrate (S64), and the i + 1-th lens substrate is laminated thereon (S65). Are bonded between the lens substrate and the spacer and between the spacer and the (i + 1) th lens substrate.

  On the other hand, when the i + 1th lens substrate is not fixed to the ith lens substrate but moved in the optical axis direction, as shown in FIG. Application of the adhesive is omitted to make non-adhesion, and a spacer is laminated on the i-th lens substrate as it is (S63).

  In the present embodiment, among the spacers 170, 180, and 190, sheet side through holes 194 and 196 penetrating in the optical axis directions D 1 and D 3 are formed on the periphery of the openings 172, 182, and 192, respectively. , 160 are formed at positions that overlap with the through holes 154, 156 formed in the peripheral portions 153, 163 of the lenses 152, 162 formed in the lens 160, 160, respectively. By forming the through holes 194 and 196 in this way, when the lens substrates 150 and 160 and the spacers 170, 180, and 190 are stacked in the thickness addition forming step S12, the through holes 154 and 156 of the lens substrates 150 and 160 are stacked. And the sheet side through holes 194, 196 of the spacers 170, 180, 190 can be used for alignment. That is, the positioning can be performed so that the through holes 154 and 156 of the lens substrates 150 and 160 and the sheet side through holes 194 and 196 of the spacers 170, 180 and 190 are arranged to penetrate in the optical axis direction. For this reason, the lens substrate 150, 160 and the spacers 170, 180, 190 are laminated to prevent a positional shift when the lens unit is manufactured, and the accuracy when the lens module is manufactured is improved. In addition, in order to enable the lens unit to move smoothly with respect to shafts SH1 and SH2 which will be described later, the surfaces of the through holes 154, 156, 194, and 196 are coated with a material having sliding properties. Is preferred.

  In the present embodiment, the through holes 154, 156, 194, and 196 are formed before the spacers 170, 180, and 190 are stacked on the lens substrates 150 and 160 in the thickness adding step S12, but the through holes 154, 156, 194, and 196 may be performed after the thickness addition step S12 or during the thickness addition step S12. That is, for example, if the positioning markings are separately formed on the end portions of the lens substrates 150 and 160 and the spacers 170, 180, and 190 by an etching technique or the like, the lens substrates 150 and 160 and the spacers 170, 180, and 190 are stacked. Then, the through holes 154, 156, 194, 196 may be formed. As described above, when the lens substrates 150 and 160 and the spacers 170, 180, and 190 are stacked and the through holes 154, 156, 194, and 196 are formed, the positions of the through holes 154, 156, 194, and 196 are the positions of the lens substrates. 150 and 160 and the spacers 170, 180, and 190 are not shifted from each other, which is desirable because the positional accuracy can be ensured.

  FIG. 7 is a schematic explanatory diagram of the shaft portion insertion step S13. When the thickness adding step S12 is completed, as shown in FIG. 7, the shafts SH1 and SH2, which are shaft portions made of metal such as stainless steel or hard resin, are inserted into the through holes 194 and 196 so as to slide. (Shaft part insertion process S13).

  FIG. 8 shows a schematic explanatory view of the cutting step S14, and FIG. 9 shows a schematic explanatory view of the assembly step S15. When the shaft portion insertion step S13 is completed, as shown in FIG. 8, the lens unit 111 is separated by dicing (cutting step S14). Then, as shown in FIG. 9, in order to realize the desired optical performance of the lens module 101, the lens units 111a, 111b, and 111c are moved in the optical axis directions D1 and D3, and between the lens units 111a, 111b, and 111c. Is set to a desired size, and the lens module is assembled (assembly step S15). At this time, if the lens units 111a, 111b, and 111c are not bonded as described above in the thickness adding step S12, the distance in the optical axis direction between the lens units 111a, 111b, and 111c can be adjusted. In the embodiment of FIG. 9, the optical elements and the spacers included in the lens units 111a, 111b, and 111c are bonded and stacked in the thickness adding step S12.

  Thus, in this embodiment, even if each lens which comprises a lens unit is thin, the thickness of a lens group is securable by laminating | stacking a spacer and a lens board | substrate. Therefore, the lens unit is not twisted when the lens unit is moved in the optical axis direction, and the occurrence of decentering between the lens units can be suppressed. In order to have functions such as zoom and autofocus, a plurality of lens modules 101 including a plurality of lens units 111a, 111b, and 111c that can move in the optical axis direction can be manufactured easily and efficiently.

  Further, in the present embodiment, in order to prevent the optical elements and spacers formed by dividing the laminated lens substrates 150 and 160 and the spacers 170, 180, and 190 by dicing from being separated from each other during dicing. Although cutting process S14 was performed after completion of part insertion process S13, shaft part insertion process S13 may be performed after performing cutting process S14.

  7 and 8 show a configuration example in which the lens unit is moved in the optical axis direction by the shaft. On the other hand, as in the first configuration example of the present embodiment described above, the lens unit is optically moved by the actuator. It may be movable in the axial direction. FIG. 10 is a schematic explanatory diagram of the cutting step S14 of the method for manufacturing the lens module of the first configuration example. In this case, when the thickness addition step S12 is completed, the shaft portion insertion step S13 is omitted, and the cutting step S14 is executed to form the lens unit 111d as shown in FIG.

  FIG. 11 shows a cross-sectional view of a spacer having a diaphragm function. In the present embodiment, as shown in FIG. 11, lens substrates 150 and 160 and spacers 175 having a diaphragm function can be laminated.

  That is, in the thickness adding step S12, the spacer 175 with a drawing function is stacked at the position where the drawing is desired. The opening 176 of the spacer 175 with a diaphragm function contacts the lens 162 formed on the lens substrate 160, and the inner inclined surface 176a has a jagged shape in order to diffuse the incident light.

  Thus, by providing a diaphragm function to the spacers constituting the lens module, it is possible to easily manufacture a lens module in which a diaphragm is installed at a desired position. Note that the configuration for securing the aperture function is not limited to FIG.

  Here, the material of the spacers 170, 180, 190 and the spacer 175 with a drawing function is a material that can be diced, is light-shielding black, has a certain degree of strength, has good sliding properties, or can be coated with a shaft. A material is preferred. Further, in order to make the movement of the lens unit in the optical axis directions D1 and D3 smooth, the surfaces of the through holes of the spacers 170, 180, and 190 may be coated with a slidable material.

  In addition, in the lens unit 111d as shown in FIG. 10, if there is one shaft that penetrates the peripheral portions of the optical elements 150e and 160e, the optical elements 150e and 160e may rotate with respect to the shaft. For this reason, it is preferable that at least two through holes 194 and 196 penetrating the periphery of the lens 152 in the optical axis direction are formed in the optical elements 150e and 160e, and the shafts SH1 and SH2 are inserted through the holes. That is, one through hole is used as a hole for preventing rotation of the optical elements 150e and 160e.

  FIG. 12 is a plan view of an embodiment of an optical element included in the lens module. When forming two through-holes in the optical element 150e, as shown in FIG. 12, in order to absorb the influence of the error, in order to absorb the influence of the error in the parts accuracy during manufacturing, One of them may be a long hole-shaped through hole 157 and the other may be formed as a round hole-shaped through hole 154 that fits with one of the shafts SH1 and SH2.

  Further, in order for the optical element 150e to move while stably sliding without shaking with respect to the shafts SH1 and SH2, it is desirable to secure the distance between the through holes 154 and 157, as shown in FIG. Thus, it is preferable that they are located on opposite sides of each other via the lens 152. At this time, if the through holes 154 and 157 are formed at positions symmetrical with respect to the center O of the lens substrate 150, the optical element 150e is erroneously reversed in the reverse direction when repairing the disassembled lens module. As a result, the lens performance of the lens module may be deteriorated. For this reason, in FIG. 12, when repairing a disassembled lens module, the through holes 154 and 157 are arranged at the center of the lens substrate 150 in order to prevent the optical element 150e from being assembled in the reverse direction. It is formed at a position that is asymmetric with respect to O.

2. Second Embodiment FIGS. 13A and 13B are schematic explanatory views of a lens module manufacturing method according to a second embodiment. In the present embodiment, a convex sleeve portion 268 is formed on the peripheral edge 263 as a thickness to be added to the optical axis directions D1 and D3 of the peripheral edge 263 of each lens 262 formed on the lens substrate 260. That is, in order to add thickness to the peripheral edge portion 263 of each lens 262, a convex sleeve portion 268 is formed on the peripheral edge portion 263 of the lens 262 instead of the spacer in the first embodiment. In this embodiment, in order to allow the lens unit to move in the optical axis direction by inserting the shaft through the sleeve portion 268, the through hole 264, so as to penetrate the sleeve portion 268 in the optical axis directions D1 and D3, 266 is formed.

  As described above, in the present embodiment, the thickness of the sleeve portion 268 can be ensured even if each lens constituting the lens unit is thin. Therefore, the lens unit may be twisted when the lens unit is moved in the optical axis direction. In addition, it is possible to suppress the occurrence of decentering between the lens units. In addition, since the number of parts can be reduced as compared with the first embodiment, the assembly accuracy is improved and the production cost is also expected to be reduced.

3. Electronic Device FIG. 14 is a perspective view of a mobile phone which is an example of an electronic device in which the camera module of this embodiment is mounted. The camera module 16 of the present embodiment is provided on the back surface 14 which is the back side of the front surface 12 on which the operation unit and the display screen of the mobile phone 10 are provided. The position where the camera module 16 is provided is not limited to the back side of the mobile phone 10 and may be installed at another position. In addition, the electronic device in which the camera module according to the present embodiment is mounted is not limited to a mobile phone, and can be applied to a portable electronic device such as a portable computer, other electronic devices, and the like.

  Although the present embodiment has been described in detail as described above, those skilled in the art can easily understand that many modifications can be made without departing from the novel matters and effects of the present invention. Let's go. Therefore, all such modifications are included in the scope of the present invention.

  For example, a term described at least once together with a different term having a broader meaning or the same meaning in the specification or the drawings can be replaced with the different term anywhere in the specification or the drawings. Further, the configurations and operations of the lens module, the camera module, and the electronic device are not limited to those described in the present embodiment, and various modifications can be made.

10 Electronic device (mobile phone) 16, 100, 120 Camera module,
102, 122, 124 lens unit,
101, 103, 123 Lens module, 104 Actuator,
106 circuit board, 108 image sensor, 110 IR cut filter,
114, 128, 132, 138, 142 Optical element, 150, 160 Lens substrate,
115, 129, 133, 139, 143, 153, 163 peripheral edge,
116, 130, 134, 140, 144, 152, 162 lenses,
118, 136, 146 spacers, 154, 156, 194, 196 through holes,
170, 180, 190 Spacer (before cutting), SH1, SH2 Shaft (shaft)

Claims (10)

A method of manufacturing a lens module comprising at least two lens units movable in the optical axis direction,
A lens substrate forming step of forming a lens substrate having a plurality of lenses formed on the substrate;
A thickness adding step of adding a thickness in the optical axis direction to a peripheral portion of each lens formed on the lens substrate;
A cutting step of cutting between a plurality of lenses formed on the lens substrate;
Only including,
In the thickness adding step, a spacer having an opening formed in a portion in contact with the lens and the lens substrate are laminated, and at least two lens substrates are laminated.
A method of manufacturing a lens module, characterized in that in the thickness adding step, the lens units are laminated so that the lens units are not bonded to each other, thereby making the interval in the optical axis direction of the lens units variable . 2. The method of manufacturing a lens module according to claim 1 , wherein the lens substrate and the spacer are not bonded, and the distance between the lens substrate and the spacer in the optical axis direction is variable. The lens module includes a lens unit including a first lens substrate, and a lens unit including a second lens substrate, and
The interval between the first lens substrate and the second lens substrate in the optical axis direction is made variable by laminating the first lens substrate and the second lens substrate without bonding. The method of manufacturing a lens module according to claim 1 . The lens module includes a lens unit including a first spacer, a lens unit including a second spacer, and
The interval between the first spacer and the second spacer in the optical axis direction is variable by stacking the first spacer and the second spacer without bonding. The manufacturing method of the lens module of Claim 1 . The lens module includes a first lens unit including a first lens substrate and a first spacer, and a second lens unit including a second lens substrate and a second spacer,
  The interval between the first lens unit and the second lens unit in the optical axis direction can be varied by stacking the first spacer and the second lens substrate without bonding. The method for manufacturing a lens module according to claim 1, wherein the lens module is manufactured. In the thickness adding step,
  Adhering and laminating the first lens substrate and the first spacer;
Adhering and laminating the second lens substrate and the second spacer;
The method of manufacturing a lens module according to claim 5, comprising: The method for manufacturing a lens module according to claim 1, wherein the spacer has a diaphragm function. further,
A through hole forming step of forming at least one through-hole extending through the peripheral portion of the front Symbol each lens in said optical axis direction,
A shaft portion insertion step of inserting the shaft portion into the through hole;
The manufacturing method of the lens module of any one of Claims 1-7 characterized by the above-mentioned . In the through hole forming step,
Forming at least two through holes penetrating the peripheral edge of each lens in the optical axis direction;
9. The method of manufacturing a lens module according to claim 8, wherein one of the through holes is formed in a long hole shape. After the shaft portion insertion step,
And before Symbol cutting step,
An assembly step of assembling the lens module by moving the lens unit in the optical axis direction after the cutting step;
The method for manufacturing a lens module according to claim 8, wherein:

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