JP6241238B2 - Lead frame for mounting light emitting element, resin molded body, and surface mounted light emitting device - Google Patents

Description

  The present invention relates to a lead frame for mounting a light emitting element, a resin molded body using the lead frame, and a surface mount type light emitting device.

  A surface-mounted light-emitting device (hereinafter simply referred to as a “light-emitting device”) on which a light-emitting element such as a light-emitting diode (LED) or a laser diode (LD) is mounted has a high-luminance light with excellent visibility. It has a number of advantages such as being able to emit light, miniaturization, low power consumption and long life. For this reason, the light-emitting device is used as, for example, a lighting device such as a light bulb, a downlight, a baselight, a streetlight, a traffic light, a backlight light source such as a liquid crystal display, and the use thereof is rapidly expanding.

  The light emitting device includes a unit mounting region including a first lead and a second lead that are spaced apart from each other and arranged in the lateral direction, a resin layer having a hole that forms a recess in which the unit mounting region is exposed on the bottom surface, and a bottom surface of the recess And a transparent resin layer made of a transparent resin filled in the recess after the light emitting element is mounted (see Patent Documents 1 and 2). Such a light emitting device generally has a resin layer having a hole at a position corresponding to each unit mounting area on a light emitting element mounting lead frame in which a plurality of unit mounting areas are connected in a grid pattern vertically and horizontally by a plurality of connection pieces. A resin molded body is produced by integrally molding the light emitting element, and the light emitting element is mounted in a recess formed by the unit mounting region and the hole of the resin layer so that the respective leads can be energized, and a transparent resin layer is formed to emit light. After the assembly of the apparatus is manufactured, the connection piece is cut into pieces by cutting with a cutting blade.

  In the lead frame used here, the width of the connection piece is made small for the purpose of saving labor in the process of cutting the connection piece, etc., so that the space between two adjacent connection pieces becomes an elongated space. Many elongated spaces are made. Due to this space, the lead frame is very thin with a thickness of μm, so that the lead frame is easily deformed like a blind. The deformation of the lead frame causes, for example, a problem that the formation position of the concave portion of the resin molded body is displaced and cannot be cut at a predetermined position at the time of cutting.

  In order to solve the above-described problems of the prior art, a lead frame having a reinforcing piece has been proposed (see Patent Document 3). FIG. 13 is a plan view schematically showing the configuration of the lead frame 100 described in Patent Document 3. As shown in FIG. The lead frame 100 includes a plurality of unit mounting regions 110 including first and second leads 120 and 121 that are spaced apart from each other, a first connection piece 111 that connects adjacent unit mounting regions 110 in the lateral direction, , Second and third connecting pieces 112 and 113 for connecting the second leads 120 and 121 in the vertical direction, respectively, and the first lead 120 and the other unit mounting in one unit mounting area 110 adjacent in the vertical direction. And an inclined reinforcing piece 114 that connects the second lead 121 in the region 110.

  FIG. 14 is a plan view schematically showing a configuration of a lead frame 101 of another embodiment described in Patent Document 3. As shown in FIG. In the lead frame 101, portions common to the lead frame 100 are denoted by the same reference numerals and description thereof is omitted. The lead frame 101 has a plurality of unit mounting regions 110, first, second, and third connection pieces 111, 112, and 113, and band-shaped reinforcements that connect the second and third connection pieces 112 and 113 in the lateral direction. And a piece 115.

JP-A-11-307820 JP 2010-62272 A JP 2012-191233 A

  In the lead frame 100 of FIG. 13, the inclined reinforcing piece 114 connects the second lead 121 of one unit mounting area 110 adjacent to the vertical direction and the first lead 120 of the other unit mounting area 110. Therefore, an effect of suppressing deformation of the lead frame 100 can be obtained. However, since the inclined reinforcing piece 114 is configured to extend in an oblique direction, it has been found by the present inventors that various problems as described below occur.

  In the integral molding of the lead frame 100 and the resin layer, the lead frame 100 is fixed in a predetermined mold, a curable resin is supplied into the mold from the lateral direction of the lead frame 100, and the lead frame 100 is formed on the surface of the lead frame 100. This is performed by thermosetting the curable resin. Here, the supply direction of the curable resin and the direction in which the inclined reinforcing piece 114 extends (oblique direction) intersect at an acute angle. As a result, depending on the molding conditions and the type of resin, it is difficult for the curable resin to flow into the periphery of the inclined reinforcing piece 114, particularly the acute angle portion formed by the third connecting piece 113 and the inclined reinforcing piece 114, and the resin layer A decrease in thickness and unfilling of the resin occur, and the mechanical strength of the cured resin layer decreases. In this state, if the resin molded body (lead frame with resin layer) is released from the mold by protruding the pins provided in the mold, the resin layer is likely to be chipped or cracked due to the impact of the protrusion of the pins. . A light-emitting device having a chip or crack in the resin layer cannot be used as a product.

  The singulation is performed by cutting the first, second, and third connecting pieces 111, 112, 113 and the inclined reinforcing piece 114 of the lead frame 100 in the horizontal direction or the vertical direction with a cutting blade. At this time, the inclined reinforcing piece 114 extends in an oblique direction, so that the width of the cut surface is increased and the burrs are easily extended in the lateral direction, and the first and second leads 120 and 121 may be short-circuited by the burrs. There is. Furthermore, in order to suppress the short circuit between the first and second leads 120 and 121 due to burrs, for example, it is necessary to increase the distance between the second and third connection pieces 112 and 113 and the inclined reinforcing piece 114. As a result, the degree of freedom in designing the lead frame 100 decreases.

  In addition, since the angle at which the cutting blade comes into contact with the inclined reinforcing piece 114 and the resin layer formed on the surface thereof becomes an acute angle, the cutting blade is easily flown in the oblique direction in which the inclined reinforcing piece 114 extends. When the cutting blade is caused to flow in an oblique direction, the line cut by the cutting blade is shifted, resulting in inconveniences such as occurrence of a short circuit and an increase in defective product rate. Furthermore, uneven wear of the cutting blade is likely to occur, the cutting performance of the cutting blade is lowered, the replacement time of the cutting blade is advanced, production delay due to replacement of the cutting blade occurs, and productivity is reduced.

  Further, the reinforcing piece 115 of the lead frame 101 in FIG. 14 is reinforced in order to surely prevent a short circuit between the first and second leads 120 and 121 in one unit mounting region 110 when being separated into pieces by cutting. The piece 115 needs to be removed by cutting. As a result, wear of the cutting blade is accelerated, production delay due to replacement of the cutting blade occurs, and productivity is reduced.

  The object of the present invention is to suppress deformation, without causing chipping or cracking in the resin layer integrally molded on the surface, and to suppress the wear of the cutting blade for cutting and extending its life and defective product rate. It is to provide a light emitting element mounting lead frame that can contribute to lowering of the temperature, a resin molded body using the same, and a surface mounted light emitting device.

  As a result of intensive studies in order to solve the above-described problems of the prior art, the present inventors have found that the unit mounting area composed of the first lead and the second lead that are spaced apart from each other and arranged in the horizontal direction is the vertical direction. And a plurality of lead frames connected in the vertical and horizontal directions by connecting pieces in the horizontal direction, a predetermined shape between the unit mounting areas adjacent in the vertical direction or between the first and second leads in one unit mounting area. A reinforcing piece having one end connected to one of the first and second leads, and the other end connected to the other of the first and second leads. It is found that a lead frame for mounting a light-emitting element that meets the purpose can be obtained by connecting or connecting the first lead or the second lead to a connecting piece that is connected in the vertical direction. It came to be completed.

  The present invention provides the following lead frames for mounting light emitting elements (1) to (4), the resin molded body (5) below, and the surface mount light emitting device (6) below.

  (1) A plurality of unit mounting areas each composed of a first lead and a second lead that are spaced apart from each other and arranged in the horizontal direction are arranged at intervals in the vertical and horizontal directions, and unit mounting areas that are adjacent in the vertical direction are adjacent to each other. The two first leads and the second leads that are matched with each other are connected by connecting pieces, and the unit mounting regions that are adjacent in the horizontal direction are such that one adjacent first lead and the other second lead are A lead frame that is connected by connecting pieces and can be separated into individual unit mounting areas by cutting the connecting pieces, and the first lead of one unit mounting area in the unit mounting areas adjacent in the vertical direction A lead frame for mounting a light emitting element, wherein the second lead of the other unit mounting region is further connected by a crank-shaped reinforcing piece.

  (2) After the crank-shaped reinforcing piece extends in the vertical direction from the first lead of one unit mounting area adjacent in the vertical direction, it is divided into pieces between the other unit mounting area adjacent in the vertical direction. Of the unit mounting area of the other unit mounting area that extends in the horizontal direction within the predetermined cutting area of a predetermined width that extends in the horizontal direction and that passes through the cutting blade for cutting the connection piece, and that extends in the vertical direction and is adjacent in the vertical direction. The lead frame for mounting a light emitting element according to (1), which is connected to a second lead.

  (3) A plurality of unit mounting areas each composed of a first lead and a second lead that are spaced apart from each other and arranged in the horizontal direction are arranged at intervals in the vertical and horizontal directions, and unit mounting areas that are adjacent in the vertical direction are adjacent to each other. The two first leads and the second leads that are matched with each other are connected by connecting pieces, and the unit mounting regions that are adjacent in the horizontal direction are such that one adjacent first lead and the other second lead are A lead frame that is connected by connecting pieces and can be separated into individual unit mounting areas by cutting the connecting pieces, and the first lead of one unit mounting area in the unit mounting areas adjacent in the vertical direction Or it is the middle part of the connecting piece that connects the second lead and the second leads of both unit mounting areas or the first leads, and the singulation between both unit mounting areas Sometimes when the connection piece is cut Further, a substantially L-shaped reinforcing piece further connects the position in the predetermined cutting area with a predetermined width extending in the horizontal direction that is expected to pass through the cutting blade or the middle part that is closer to the other unit mounting area than the area. A lead frame for mounting a light-emitting element.

The light emitting element mounting lead frame (3) can be rephrased as follows.
A plurality of unit mounting areas each including a first lead and a second lead that are spaced apart from each other and arranged in the horizontal direction are arranged at intervals in the vertical and horizontal directions, and the unit mounting areas that are adjacent in the vertical direction are both adjacent to each other. The first leads and the second leads are connected by connecting pieces, and the unit mounting regions adjacent in the horizontal direction are such that one adjacent first lead and the other second lead are connected pieces. A lead frame that is connected and can be separated into individual unit mounting areas by cutting these connection pieces,
In the unit mounting areas adjacent in the vertical direction, the first lead or the second lead in one unit mounting area is connected to the second leads or the first leads in the unit mounting areas adjacent in the vertical direction. Further comprising a substantially L-shaped reinforcing piece for connecting the middle part of the connecting piece,
The middle part is a position within a predetermined cutting area having a predetermined width extending in the horizontal direction and through which a cutting blade for cutting a connecting piece is to be passed when separating between unit mounting areas adjacent in the vertical direction. A lead frame for mounting a light emitting element, wherein the lead frame is located closer to the other unit mounting region than the region.

  (4) A plurality of unit mounting areas each composed of a first lead and a second lead that are spaced apart from each other and arranged in the horizontal direction are arranged at intervals in the vertical and horizontal directions, and unit mounting areas adjacent in the vertical direction are adjacent to each other. The two first leads and the second leads that are matched with each other are connected by connecting pieces, and the unit mounting regions that are adjacent in the horizontal direction are such that one adjacent first lead and the other second lead are A lead frame which is connected by connecting pieces and can be separated into individual unit mounting areas by cutting the connecting pieces, and the first lead and the second lead constituting the unit mounting area are The horizontal direction that extends in the direction of the unit mounting area adjacent in the vertical direction from the lead and passes the cutting blade for cutting the connection piece at the time of the singulation between at least the adjacent unit mounting areas Predetermined width extending to After reaching the cutting area, a substantially U-shaped or substantially U-shaped light-emitting element mounting lead frame characterized by being connected by reinforcing piece returns to the other lead.

The light emitting element mounting lead frame (4) can be rephrased as follows.
A plurality of unit mounting areas each including a first lead and a second lead that are spaced apart from each other and arranged in the horizontal direction are arranged at intervals in the vertical and horizontal directions, and the unit mounting areas that are adjacent in the vertical direction are both adjacent to each other. The first leads and the second leads are connected by connecting pieces, and the unit mounting regions adjacent in the horizontal direction are such that one adjacent first lead and the other second lead are connected pieces. A lead frame that is connected and can be separated into individual unit mounting areas by cutting these connection pieces,
Further comprising a substantially U-shaped or substantially U-shaped reinforcing piece for connecting the first lead and the second lead constituting one unit mounting region,
The substantially U-shaped or substantially U-shaped reinforcing piece is in the direction of the unit mounting region that is vertically adjacent to one of the first lead and the second lead constituting one unit mounting region. Extending to the at least one unit mounting region adjacent in the vertical direction to a cutting planned region having a predetermined width extending in the lateral direction that is scheduled to pass the cutting blade for cutting the connection piece when singulated. A lead frame for mounting a light emitting element, wherein the lead frame returns to the other lead.

  (5) The light emitting element mounting lead frame according to any one of the above (1) to (4), and a resin layer formed integrally with the lead frame and having a recess in which the surface of each lead is exposed as a bottom surface. A resin molded product characterized by

The resin molded body of (5) can be paraphrased as follows.
A lead frame for mounting the light emitting element according to any one of (1) to (4) above, and a recess in which the surface of each unit mounting area provided in the lead frame is exposed as a bottom surface by integral molding to the lead frame for mounting the light emitting element. And a resin layer having a plurality of holes to be formed.

  (6) A unit mounting region of the light emitting element mounting lead frame according to any one of (1) to (4) and a recess formed integrally with the unit mounting region and exposing the surface of the unit mounting region as a bottom surface. A light-emitting element mounted on the surface of the unit mounting area exposed as a bottom surface of the concave portion so as to be energized, and a transparent resin layer made of a transparent resin filled in the concave portion. A surface mount type light emitting device characterized by the above.

The surface mount type light emitting device of the above (6) can be rephrased as follows.
The unit mounting area of the lead frame for mounting a light emitting element according to any one of (1) to (4) above, and a hole for forming a recess in which the surface of the unit mounting area is exposed as a bottom surface by integral molding into the unit mounting area A resin layer having a light emitting element mounted on the surface of the unit mounting area exposed as a bottom surface of the recess so as to be energized, and a transparent resin layer made of a transparent resin filled in the recess. A surface-mounted light-emitting device comprising:

  The light emitting element mounting lead frame of the present invention (hereinafter sometimes simply referred to as “lead frame”) has a unit mounting area composed of a first lead and a second lead spaced apart from each other in the horizontal direction. A plurality of unit mounting regions that are arranged at intervals and adjacent to each other in the vertical direction are unit mountings in which both the first leads and the second leads are connected by connecting pieces, respectively, and are adjacent in the horizontal direction. In the lead frame (A), one adjacent first lead and the other second lead are connected by connection pieces, and the connection pieces can be separated into individual unit mounting areas by cutting these connection pieces. The crank-shaped reinforcing piece is used, one end of the crank-shaped reinforcing piece is connected to the first lead of one unit mounting area in the unit mounting area adjacent in the vertical direction, and the other end is connected to the second lead of the other unit mounting area. Lee By connecting to constitute them to further consolidated.

  With such a configuration, the crank-shaped reinforcing piece does not form an acute angle portion with the first and second leads while suppressing deformation of the lead frame, so that it is cured when the curable resin is supplied and thermally cured. It is suppressed that the conductive resin is unfilled or the filling amount is reduced and the cured resin layer is thinner than other parts, and the resin layer having a predetermined thickness on the lead frame is almost uniform. Formed. For this reason, the occurrence of chipping or cracking in the resin layer due to the impact of the protrusion of the pin when the resin molded body (lead frame with resin layer) is released from the mold is remarkably suppressed.

  Further, since the crank-shaped reinforcing piece extends in the vertical direction and the horizontal direction of the lead frame, the cutting blade comes into contact with the crank-shaped reinforcing piece in a direction perpendicular thereto. For this reason, the width of the cut surface is reduced and the growth of the cut burrs is extremely reduced, so that the first and second leads are prevented from being short-circuited by the cut burrs. For this reason, it is not necessary to widen the interval between the crank-shaped reinforcing piece and the other connecting piece (cut piece), and the degree of freedom in design is increased. For example, arrangement of unit mounting areas, arrangement of connecting pieces and crank-shaped reinforcing pieces, etc. The variation of can be increased.

  In addition, since the cutting blade comes into contact with the crank-shaped reinforcing piece from a direction perpendicular and / or parallel, the cutting blade may be swept away and the cutting line may be displaced, or the cutting blade may be unevenly worn. Is prevented. Further, as described above, the width of the cut surface is reduced. For this reason, the wear of the cutting blade and the occurrence of defective products are remarkably suppressed, the time until the cutting blade is replaced becomes longer, the defective product rate is reduced, and the productivity is improved.

  In the lead frame for mounting a light emitting element of the present invention having a crank-shaped reinforcing piece, the crank-shaped reinforcing piece extends in the vertical direction from the first lead in one unit mounting region in the unit mounting region adjacent in the vertical direction, Extending in the horizontal direction within a predetermined cutting area extending in the horizontal direction that is intended to pass the cutting blade for cutting the connection piece when singulated with the other unit mounting area adjacent in the vertical direction, Further, it is preferably configured to be connected to the second lead of the other unit mounting region extending in the vertical direction and adjacent in the vertical direction. With this configuration, the effect of the crank-shaped reinforcing piece suppressing the deformation of the lead frame is enhanced, and a short circuit between the first and second leads is reliably prevented.

  The lead frame for mounting a light emitting element according to the present invention uses a substantially L-shaped reinforcing piece in the lead frame (A), and one end of the substantially L-shaped reinforcing piece in the unit mounting region adjacent in the vertical direction. Connect to the first lead or the second lead of the unit mounting area, and connect the other ends of the substantially L-shaped reinforcing pieces to the second leads or the first leads of the unit mounting areas adjacent in the vertical direction. It connects so that it may connect to the middle part of a connection piece. With such a configuration, an effect similar to that of the light emitting element mounting lead frame using the crank-shaped reinforcing piece is obtained, and an effect of suppressing deformation of the lead frame is further improved.

  Moreover, the lead frame for mounting a light emitting element of the present invention uses a substantially U-shaped reinforcing piece or a substantially U-shaped reinforcing piece in the lead frame (A), and has one substantially U-shaped or substantially U-shaped reinforcing piece. The first lead and the second lead constituting the unit mounting area are connected to each other, and the substantially U-shaped or substantially U-shaped reinforcing piece forms the first lead and the second lead constituting one unit mounting area. Cutting for connecting piece cutting at the time of singulation between at least one unit mounting area extending from one of the leads in the direction of the other unit mounting area adjacent in the vertical direction It is configured to return to the other lead after reaching a predetermined cutting area having a predetermined width extending in the horizontal direction, which is to pass the blade. With such a configuration, an effect similar to that of the light emitting element mounting lead frame using the crank-shaped reinforcing piece can be obtained.

  Since the resin molded body of the present invention is integrally formed with the light emitting element mounting lead frame of the present invention, a resin layer having a predetermined thickness and free from chipping and cracking is suitable for mounting of light emitting elements. Can be used.

  The surface-mounted light-emitting device of the present invention is produced by separating a light-emitting device assembly produced using the light-emitting element mounting lead frame of the present invention, and has a predetermined thickness, chipping and cracking. Since the resin layer that does not cause the generation is integrally formed on the lead frame, it is possible to stably emit light with high luminance and good visibility, and further have high durability.

It is a top view which shows the structure of a unit mounting area | region typically. 1 is a plan view schematically showing the configuration of a lead frame according to a first embodiment. It is sectional drawing which shows the modification of the reinforcement piece in the lead frame of 1st Embodiment. It is a top view which shows the modification of the lead frame of 1st Embodiment. It is sectional drawing which shows typically the structure of the resin molding produced using the lead frame of 1st Embodiment shown in FIG. It is a perspective view which shows typically the structure of the surface mount type light-emitting device produced using the lead frame of 1st Embodiment shown in FIG. It is a top view which shows typically the structure of the lead frame of 2nd Embodiment. It is a top view which shows typically the structure of the lead frame of 3rd Embodiment. It is a top view which shows typically the structure of the lead frame of 4th Embodiment. It is a top view which shows the modification of the lead frame of 2nd Embodiment. It is a top view which shows the modification of the lead frame of 3rd Embodiment. It is a top view which shows the modification of the lead frame of 4th Embodiment. 10 is a plan view schematically showing a configuration of a lead frame described in Patent Document 3. FIG. 10 is a plan view schematically showing the configuration of another form of lead frame described in Patent Document 3. FIG.

Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
First, a light emitting element mounting lead frame 1 (hereinafter, simply referred to as “lead frame 1”) according to a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a plan view schematically showing the configuration of the unit mounting area 10. FIG. 2 is a plan view schematically showing the configuration of the main part of the lead frame 1 of the first embodiment. In the present specification, the horizontal direction is the horizontal direction and the vertical direction is the vertical direction on the paper surface of FIG. FIG. 3 is a cross-sectional view showing a modification of the crank-shaped reinforcing piece in the lead frame 1 shown in FIG. FIG. 4 is a plan view schematically showing a configuration of a main part of a lead frame 1a which is a modification of the lead frame 1 shown in FIG.

  The lead frame 1 is composed of first and second leads 30 and 31 that are spaced apart from each other in the lateral direction of the lead frame 1 (hereinafter simply referred to as “lateral direction”), and are spaced apart in the vertical and horizontal directions. A plurality of first connections for connecting a plurality of unit mounting regions 10 arranged in a grid and the first leads 30 adjacent to each other in the vertical direction of the lead frame 1 (hereinafter simply referred to as “vertical direction”). The plurality of second connection pieces 12 that connect the pieces 11, the second leads 31 that are adjacent in the vertical direction, one first lead 30 and the other second lead in the unit mounting region 10 that are adjacent in the horizontal direction. A plurality of third connecting pieces 13 for connecting the leads 31 and a plurality of cranks for connecting one first lead 30 and the other second lead 31 in the unit mounting region 10 adjacent in the vertical direction. A reinforcing piece 15, and first, second, 3 and is configured singulated capable per unit mounting area 10 by cutting the connection pieces 11, 12, 13 and a crank-shaped reinforcing piece 15.

  In the unit mounting area 10, a light emitting element (not shown) is mounted, and further, a first lead 30 to which one electrode of the light emitting element is connected, and a second lead 31 to which the other electrode of the light emitting element is connected. The minimum unit of the region where the light emitting element is mounted, including the first and second leads 30 and 31 and the space interposed between them. Of course, a light emitting element may be mounted on the second lead 31. The shape of the first and second leads 30 and 31 is a rectangle in this embodiment, but is not limited to this, and at least one of the four corners of the rectangle is a triangular shape, an ellipse, or an ellipse. Or the like.

  The first and second lead portions 30 and 31 have a relatively thick portion and a relatively thin portion, and the boundary between them is indicated by a dotted line in FIGS. 1, 2, and 4. ing. That is, in the first and second lead portions 30 and 31, the inner region surrounded by the dotted line is a relatively thick portion, and the outer region from the dotted line, that is, the dotted line and the first and second lead portions. The outer regions surrounded by the peripheral edges of 30 and 31 are relatively thin portions. The outer region is preferably formed by, for example, half-etching from the viewpoint of further improving the adhesion between the lead frame 1 and a resin layer (not shown) integrally molded therewith. The outer region is formed such that the surface thereof has a step with respect to the surface of the inner region on the light emitting device mounting surface of the first and second lead portions 30 and 31 and / or the surface on the opposite side. .

  In the present embodiment, the boundary between the inner region and the outer region is configured to be substantially linear. However, the present invention is not limited to this, and at least a part of the inner region or the outer region is directed toward the outer region or the inner region. And may be configured to partially protrude. In the present embodiment, the first and second lead portions 30 and 31 are configured such that the thickness of the inner region is larger than the thickness of the outer region, but the present invention is not limited to this. The second lead portions 30 and 31 may have a uniform thickness as a whole. As in FIGS. 1, 2, and 4, also in FIGS. 7 to 14, the boundary between the relatively thick inner region and the relatively thin outer region is indicated by a dotted line. Also in the later-described embodiments shown in FIGS. 7 to 12, lead portions having an overall uniform thickness can be used.

  The first and second connection pieces 11 and 12 are band-like metal pieces extending in the vertical direction, and are arranged in the horizontal direction so as to be separated from each other. The first connection piece 11 connects the first leads 30 of the unit mounting regions 10 arranged in the vertical direction to each other at the substantially central portion in the horizontal direction of the first lead 30. The second connection piece 12 is configured such that the second leads 31 in the unit mounting area 10 arranged in the vertical direction are arranged at the end portion on the side away from the first lead 30 in the same unit mounting area 10 of the second lead 31. It is connected. The first and second connection pieces 11 and 12 are arranged corresponding to the arrangement order of the first and second leads 30 and 31. The widths of the first and second connection pieces 11 and 12 may be the same or different.

  Between the pair of unit mounting regions 10 adjacent in the vertical direction, there is an intermediate region extending in the horizontal direction including the first and second connection pieces 11 and 12 and a crank-shaped reinforcing piece 15 described later. Further, in the horizontal intermediate region, the cutting blades for cutting the first and second connecting pieces 11 and 12 and the crank-shaped reinforcing piece 15 are allowed to pass in the horizontal direction when singulated. There is an area to be cut having a predetermined width extending. The width (length in the vertical direction) of the planned cutting region can be appropriately selected according to changes in the shape and dimensions (particularly width) of the crank-shaped reinforcing piece 15.

  The third connection piece 13 is a band-shaped metal piece extending in the lateral direction, and the first lead 31 and the other first lead 30 in the pair of unit mounting regions 10 arranged in the lateral direction are connected to the first connection piece 13. The second leads 30 and 31 are connected at substantially the center in the vertical direction. The third connection pieces 13 are arranged in the vertical direction with a predetermined interval according to the vertical dimension of the unit mounting region 10. The width of the third connection piece 13 may be the same as or different from that of the first and second connection pieces 11 and 12.

  Between a pair of unit mounting areas 10 adjacent in the horizontal direction, there is an intermediate area including the third connection piece 13 and extending in the vertical direction. Further, a predetermined width extending in the vertical direction in which the cutting blade for cutting the connection between the first lead 30 and the second lead 31 is allowed to pass in the middle region in the vertical direction when being separated. There are scheduled cutting areas in the vertical direction. The width (the length in the horizontal direction) of the planned cutting area in the vertical direction can be appropriately selected according to, for example, the width dimension of the third connection piece 13.

  The crank-shaped reinforcing piece 15 is disposed between the first and second connecting pieces 11 and 12 in the lateral direction so as to be separated from the first and second connecting pieces 11 and 12, and as described above, It is a metal piece that connects one first lead 30 and the other second lead 31 in a pair of unit mounting regions 10 adjacent to each other in the direction. In the present embodiment, the crank-shaped reinforcing piece 15 includes the end portion of the first lead 30 in one unit mounting region 10 on the side facing the second lead 31, and the second lead in the other unit mounting region 10. 31 is connected to the first lead 30 and the end facing the first lead 30, but the connecting position is not particularly limited as long as it is not in contact with the first and second connection pieces 11 and 12.

  The crank-shaped reinforcing piece 15 has a very high effect of suppressing deformation of the lead frame 1. At the same time, the crank-shaped reinforcing piece 15 and the first and second leads 30 and 31 do not form an acute angle portion, and therefore, when the resin layer is integrally formed by supplying a curable resin and thermosetting it, Thinning of the resin layer due to unfilling of the curable resin and a decrease in the filling amount is prevented, the mechanical strength of the resin layer is increased, and cracks and chips in the resin layer when the molded resin is released from the mold Generation is remarkably suppressed. Further, since the cutting blade comes into contact with the crank-shaped reinforcing piece 15 at a substantially right angle, wear due to the flow of the cutting blade or uneven wear is suppressed, and the effect of extending the life of the cutting blade and reducing the defective product rate, etc. Can be achieved and productivity can be improved.

In addition, the crank-shaped reinforcing piece 15 is in a pair of unit mounting regions 10 adjacent in the vertical direction.
After extending in the vertical direction from the first lead 30 of one unit mounting area 10, it extends in the horizontal direction in the planned cutting area existing between the other unit mounting area 10 and further extends in the vertical direction to the other side. Preferably, the unit mounting area 10 is configured to be connected to the second lead 31. With this configuration, the occurrence of chipping and cracks in the resin layer is suppressed as described above, and the life of the cutting blade is increased, the defective product rate is reduced, and the like. In particular, the deformation of the lead frame 1 by the crank-shaped reinforcing piece 15 is achieved. In addition, the short-circuit between the first and second leads 30 and 31 is reliably prevented.

  In the present embodiment, the crank-shaped reinforcing piece 15 has a uniform thickness as a whole as shown in FIG. 3A, but is not limited thereto. FIG. 3 is a sectional view in the thickness direction showing a modification of the crank-shaped reinforcing piece 15. In FIG. 3, one end along the thickness direction is a connection position with the first lead 30, and the other end is a connection position with the second lead 31.

  As another embodiment regarding the thickness of the crank-shaped reinforcing piece 15, for example, it has a thin portion with a predetermined width (including a case where the width is 0) from the connection position with the first lead 30 or the second lead 31. Form (FIG. 3B), form having a thin portion with a predetermined width (including a case where the width is 0) from the connection position with the first and second leads 30, 31 (FIG. 3C), Examples include a thin portion in the middle of the connection position with the first and second leads 30 and 31, and the thin portion existing in a planned cutting region extending in the lateral direction (FIG. 3D). . Among these, since the life of the cutting blade can be further extended without substantially reducing the effect of suppressing the deformation of the lead frame 1 by the crank-shaped reinforcing piece 15, the configuration of FIG. 3D is preferable. In these thin portions, one surface is on the same plane as the light emitting element mounting surface (hereinafter simply referred to as “mounting surface”) of the first and second leads 30 and 31, and the other surface is the first, The second lead 30, 31 may be formed so as to have a step with respect to the surface opposite to the mounting surface (hereinafter simply referred to as “opposite side surface”), and one surface is in relation to the mounting surface. May be formed so that the other surface is flush with the opposite side surface, and one and the other surface are stepped with respect to the mounting surface and the opposite side surface, respectively. May be.

  The lead frame 1 can be produced by, for example, performing a known punching process or etching process on a thin metal plate made of a metal material that is a good electrical conductor. Although it does not specifically limit as a metal material, For example, iron, copper, phosphor bronze, a copper alloy etc. are used.

  The lead frame 1a shown in FIG. 4 has a common part with the lead frame 1, and the common parts of the lead frames 1 and 1a are denoted by the same reference numerals and description thereof is omitted. The lead frame 1a has a substantially S-shaped crank-shaped reinforcing piece 15a. The crank-shaped reinforcing piece 15a is a reinforcing piece in which a corner portion of the crank-shaped reinforcing piece 15 is configured by a curve. The crank-shaped reinforcing piece 15a also does not form an acute angle portion with the first and second leads 30 and 31, and does not cross the cutting blade at an acute angle. Therefore, the lead frame 1a can achieve the same effect as the lead frame 1.

  FIG. 5 is a cross-sectional view schematically showing a configuration of a resin molded body 40 manufactured using the lead frame 1. The resin molded body 40 has a thin plate shape, and is integrally molded on the surface of the unit mounting area 10 and the unit mounting area 10 composed of the first and second leads 30 and 31 arranged so as to be spaced apart from each other. And a resin layer 41 having a hole for forming a recess 42 in which the unit mounting area 10 is exposed on the bottom surface. The first and second leads 30 and 31 are exposed on the outer side surface (side surface in the thickness direction) 43 of the resin molded body 40.

  A metal layer such as a plating layer may be formed on at least one surface of the first and second leads 30, 31, particularly on the surface of the unit mounting region 10 exposed at the bottom surface 42 a of the recess 42. Examples of the material for the metal layer include gold, silver, copper, and aluminum. When the metal layer is made of silver, the thickness is not particularly limited, but is preferably 0.5 μm to 20 μm, more preferably 1 μm to 15 μm from the viewpoint of suppressing discoloration, heat generation, peeling, and the like of the metal layer.

  The first lead 30 includes a first inner lead portion 30 a exposed on the bottom surface 42 a of the recess 42, and a first outer lead portion 30 b connected to the first inner lead portion 30 a and in contact with the resin layer 41. In FIG. 5, the broken line shown between the 1st inner lead part 30a and the 1st outer lead part 30b has shown these boundaries. The second lead 31 includes a second inner lead portion 31 a exposed on the bottom surface 42 a of the recess 42, and a second outer lead portion 31 b connected to the second inner lead portion 31 a and in contact with the resin layer 41. In FIG. 5, the broken line shown between the 2nd inner lead part 31a and the 2nd outer lead part 31b has shown these boundaries.

  The resin layer 41 is formed so as to rise from the surface of the unit mounting region 10, and reflects the light from the light emitting element forward (the inclined surface of the recess 42), the first and second leads 30, And an insulating part 41b that insulates them from each other. The shape of the resin layer 41 and the recessed part 42 is not specifically limited, It can select suitably from well-known shapes.

  Since the resin molded body 40 having the above-described configuration is manufactured using the lead frame 1, the resin layer 41 has a predetermined thickness, and the resin layer 41 does not have a chip or a crack. It can be suitably used for mounting a device to manufacture a light emitting device. A light emitting device is obtained by mounting a light emitting element in each recess 42 of the resin molded body 40 and forming a transparent resin layer, and then separating it with a cutting blade. Alternatively, the light emitting device may be manufactured by dividing the resin molded body 40 into individual pieces, mounting the light emitting elements in the concave portions 42 of the obtained unit resin molded body (not shown), and forming a transparent resin layer.

FIG. 6 is a perspective view schematically showing a configuration of a surface-mount light-emitting device 50 manufactured using the lead frame of the first embodiment shown in FIG. The light emitting device 50 includes a resin layer 41 having a hole for forming a unit mounting area 10 of the lead frame 1 and a recess 42 in which the surface of the unit mounting area 10 is exposed as a bottom surface 42a by integral molding to the unit mounting area 10. And a light emitting element 51 mounted on the surface of the unit mounting region 10 exposed as the bottom surface 42a of the recess 42 so as to be energized, and a transparent resin layer (not shown) made of a transparent resin filled in the recess 40. It is comprised so that.
In the present embodiment, the lead frame 1 is used to manufacture the light emitting device 50. However, the present invention is not limited to this, and any of the lead frames 1a, 2, 2a, 3, 3a, 4, 4a described later is used. May be.

  In the light emitting device 50, the first and second leads 30 and 31 and a part of the insulating portion 41 b that insulates them are exposed in the unit mounting region 10 exposed on the bottom surface 42 a of the recess 42. The light emitting element 51 is fixed on the surface of the first lead 30, and one of the two wire bondings 53, 54 such as two gold wires connected to the light emitting element 51 is connected to the first lead 30. The light emitting element 51 is mounted on the bottom surface 42 a of the recess 42 by connecting the other wire bonding 54 to the second lead 31. After mounting the light emitting element 51, the recess 42 is filled with a liquid transparent resin to form a transparent resin layer.

The light emitting device 50 is manufactured using the lead frame 1 and has a predetermined thickness, and the resin layer 41 that is free from chipping and cracking is integrally formed in the unit mounting region 10. Good light emission can be performed stably, and it has higher durability.
The structure of the light-emitting device of the present invention is not limited to the structure of the light-emitting device 50 of the present embodiment, and any known light-emitting device structure can be adopted except that the light-emitting device is manufactured using the lead frame of the present invention.

  FIG. 7 is a plan view schematically showing the configuration of the main part of the lead frame 2 of the second embodiment. The lead frame 2 has a common part with the lead frame 1, and the common part is denoted by the same reference symbol and description thereof is omitted.

  The lead frame 2 includes a plurality of unit mounting regions 10 arranged in a grid pattern at intervals in the vertical and horizontal directions, and a plurality of first and fourth connection pieces respectively connecting the first leads 30 adjacent in the vertical direction. 11, 16, a plurality of second connection pieces 12, a plurality of third connection pieces 13, one second lead 31 and a fourth connection piece in a pair of unit mounting regions 10 adjacent in the vertical direction. A substantially L-shaped reinforcing piece 17 that connects the middle part of 16 and a unit by cutting the first, second, and fourth connecting pieces 11, 12, 16 and the substantially L-shaped reinforcing piece 17. Each mounting area 10 is configured to be singulated.

  Here, the middle part of the fourth connecting piece 16 that connects both the first leads 30 in a pair of unit mounting areas 10 adjacent in the vertical direction is a pair of (both) unit mounting areas adjacent in the vertical direction. This means a position in a predetermined cutting area having a predetermined width extending in the horizontal direction between 10 (intermediate areas) or a position closer to the other unit mounting area 10 than the planned cutting area. Here, as described above, the planned cutting region is a region extending in the lateral direction that is intended to pass through a cutting blade for cutting a connection piece when singulated. Also, the other unit mounting area is one unit mounting area 10 including the second lead 31 to which one end of the substantially L-shaped reinforcing piece 17 is connected in a pair of unit mounting areas 10 adjacent in the vertical direction. In the other case.

  That is, the lead frame 2 includes (a) a fourth connection piece 16 together with the first and second connection pieces 11 and 12 as connection pieces for connecting the unit mounting regions 10 arranged in a grid pattern in the vertical and horizontal directions. (B) The reinforcing piece has a substantially L-shaped reinforcing piece 17 whose both ends are connected to predetermined positions.

  The fourth connection piece 16 is a strip-shaped metal piece extending in the vertical direction, and is disposed between the first and second connection pieces 11 and 12 so as to be spaced apart from each other, and is adjacent to the first lead in the vertical direction. 30 are connected to the second lead 31 in the same unit mounting region 10 of the first lead 30 at the end portion on the side facing the lateral direction. The widths of the first to fourth connection pieces 11, 12, 13, 16 may be the same or different.

  Between the pair of unit mounting regions 10 adjacent to each other in the vertical direction, the intermediate region extending in the horizontal direction includes the first, second, and fourth connection pieces 11, 12, 16 and a substantially L-shaped reinforcing piece 17 to be described later. Exists. Further, a cutting blade for cutting the first, second, and fourth connecting pieces 11, 12, 16 and the substantially L-shaped reinforcing piece 17 at the time of singulation is provided in the lateral intermediate region. There is a predetermined cutting area with a predetermined width extending in the horizontal direction to be passed. The width (length in the vertical direction) of the planned cutting region can be appropriately selected according to the change in the dimensions of the substantially L-shaped reinforcing piece 17 and the like.

  The substantially L-shaped reinforcing piece 17 is disposed so as to be separated from the first and second connecting pieces 11 and 12 in the lateral direction and to be connected to the second lead 31 and the fourth connecting piece 16. It is a substantially L-shaped metal piece. That is, one end of the substantially L-shaped reinforcing piece 17 is connected to one second lead 31 in the pair of unit mounting regions 10 adjacent in the vertical direction, and the other end is both of the pair of unit mounting regions 10. It is connected to the middle part of the fourth connecting piece 16 that connects the first lead 30. The intermediate portion is a position in a horizontal cutting planned area between the pair of unit mounting areas 10 or a position closer to the other unit mounting area than the planned cutting area. The modification regarding the thickness of the substantially L-shaped reinforcing piece 17 is the same as the modification regarding the thickness of the crank-shaped reinforcing piece 15.

  By configuring as described above, the effect of suppressing deformation of the lead frame 2 is further improved. Further, the substantially L-shaped reinforcing piece 17 does not form an acute angle portion between the first and second leads 30 and 31, and does not intersect the cutting blade at an acute angle. Therefore, as with the lead frame 1, the lead frame 2 prevents the resin layer from being chipped or cracked when the resin layer is integrally formed. Productivity improvement is achieved by extending the service life and reducing the defective product rate.

  FIG. 10 is a plan view schematically showing a configuration of a main part of a lead frame 2a which is a modification of the lead frame 2. As shown in FIG. Here, common portions of the lead frames 2 and 2a are denoted by the same reference numerals, and description thereof is omitted. The lead frame 2a has a substantially L-shaped reinforcing piece 17a in which a corner portion of the substantially L-shaped reinforcing piece 17 is configured by a curve. The substantially L-shaped reinforcing piece 17a also does not form an acute angle portion with the first and second leads 30 and 31, and does not intersect the cutting blade at an acute angle. Therefore, the lead frame 2a can achieve the same effect as the lead frames 1 and 2.

  FIG. 8 is a plan view schematically showing the configuration of the main part of the lead frame 3 of the third embodiment. The lead frame 3 has a common part with the lead frames 1 and 2, and the common part is denoted by the same reference numeral and description thereof is omitted.

  The lead frame 3 is adjacent to the plurality of unit mounting regions 10 arranged in a lattice pattern at intervals in the vertical and horizontal directions, and the plurality of first, second, and third connection pieces 11, 12, and 13 in the vertical direction. A fifth connection piece 18 for connecting both second leads 31 in the pair of unit mounting areas 10, and one half of the first lead 30 and the fifth connection piece 18 in the pair of unit mounting areas 10. By cutting the first, second, third and fifth connecting pieces 11, 12, 13, 18 and the substantially L-shaped reinforcing piece 19 Each unit mounting area 10 is configured to be separated into individual pieces.

  Here, the middle part of the fifth connection piece 18 that connects the second leads 31 in the pair of unit mounting regions 10 is the lateral direction between the pair (both) of the unit mounting regions 10 (intermediate region). A unit mounting area 10 (the unit mounting area 10 in which the substantially L-shaped reinforcing piece 19 is connected to the first lead 30 is connected to the first lead 30 at a position within the predetermined cutting area with a predetermined width or the other cutting area. Means a position close to the other unit mounting area 10).

  The lead frame 3 includes (a) first and second connection pieces 11 and 12 as well as fifth connection pieces 18 as connection pieces that vertically connect the unit mounting regions 10 arranged in a grid pattern in the vertical and horizontal directions. And (b) a reinforcing piece having a substantially L-shaped reinforcing piece 19 having both ends connected to predetermined locations.

  The fifth connection piece 18 is a strip-shaped metal piece extending in the vertical direction, and is disposed between the first and second connection pieces 11 and 12 so as to be spaced apart from each other and is adjacent to the second lead in the vertical direction. 31 are connected to each other at the end of the second lead 31 on the side facing the first lead 30 in the same unit mounting region 10 in the lateral direction. The widths of the first, second, third, and fifth connection pieces 11, 12, 13, and 18 may be the same or different.

  Between the pair of unit mounting regions 10 adjacent to each other in the vertical direction, the intermediate region extending in the horizontal direction includes the first, second, and fifth connection pieces 11, 12, 18 and a substantially L-shaped reinforcing piece 19 to be described later. Exists. Furthermore, a cutting blade for cutting the first, second, and fifth connecting pieces 11, 12, 18 and the substantially L-shaped reinforcing piece 19 is provided in the intermediate region in the lateral direction when singulated. There is a predetermined cutting area with a predetermined width extending in the horizontal direction to be passed. The width (length in the vertical direction) of the planned cutting region can be selected as appropriate according to changes in the dimensions of the substantially L-shaped reinforcing piece 19 and the like.

  The substantially L-shaped reinforcing piece 19 is separated from the first and second connecting pieces 11 and 12 in the lateral direction, and is connected to the middle portion of the first lead 30 and the fifth connecting piece 18. Are substantially L-shaped metal pieces. That is, one end of the substantially L-shaped reinforcing piece 19 is connected to one first lead 30 in the pair of unit mounting regions 10 adjacent in the vertical direction, and the other end is both of the pair of unit mounting regions 10. The second lead 31 is connected to the middle portion of the fifth connection piece 18 that connects the second leads 31. The intermediate portion is a position in a horizontal cutting planned area between the pair of unit mounting areas 10 or a position closer to the other unit mounting area than the planned cutting area. The modification regarding the thickness of the substantially L-shaped reinforcing piece 19 is the same as the modification regarding the thickness of the crank-shaped reinforcing piece 15.

  By configuring as described above, the effect of suppressing deformation of the lead frame 3 is further improved. Further, the substantially L-shaped reinforcing piece 19 does not form an acute angle portion between the first and second leads 30 and 31, and does not intersect the cutting blade at an acute angle. Therefore, as with the lead frame 1, the lead frame 3 prevents the resin layer from being chipped or cracked when the resin layer is integrally formed. Productivity improvement is achieved by extending the service life and reducing the defective product rate.

  FIG. 11 is a plan view schematically showing the configuration of the main part of a lead frame 3a which is a modification of the lead frame 3. As shown in FIG. Here, common portions of the lead frames 3 and 3a are denoted by the same reference numerals, and description thereof is omitted. The lead frame 3a includes a substantially L-shaped reinforcing piece 19a in which a corner portion of the substantially L-shaped reinforcing piece 19 is configured by a curve. The substantially L-shaped reinforcing piece 19a also does not form an acute angle portion between the first and second leads 30 and 31, and does not intersect the cutting blade at an acute angle. Therefore, the lead frame 3 a can achieve the same effect as the lead frames 1 and 3.

  FIG. 9 is a plan view schematically showing the configuration of the main part of the lead frame 4 of the fourth embodiment. The lead frame 4 has common portions with the lead frames 1, 2, and 3, and the common portions are denoted by the same reference numerals and description thereof is omitted.

  The lead frame 4 includes a plurality of unit mounting regions 10 arranged in a grid pattern at intervals in the vertical and horizontal directions, a plurality of first, second, and third connection pieces 11, 12, 13, and one unit mounting. The first and second leads 30 and 31 constituting the region 10 extend from one lead in the direction of the unit mounting region 10 adjacent in the vertical direction, and at least between the adjacent unit mounting regions 10. A substantially U-shaped reinforcing piece 20 that extends and connects so as to return to the other lead after reaching a predetermined cutting area with a predetermined width extending in the direction, and the first, second, and third connecting pieces 11, 12 and 13 and the substantially U-shaped reinforcing piece 20 are cut into pieces for each unit mounting region 10.

  Between the pair of unit mounting regions 10 adjacent in the vertical direction, there is an intermediate region including the first and second connection pieces 11 and 12 and the substantially U-shaped reinforcing piece 20 and extending in the horizontal direction. Further, a cutting blade for cutting the first and second connecting pieces 11 and 12 and the substantially U-shaped reinforcing piece 20 is allowed to pass through the intermediate region in the lateral direction when singulated. There is a predetermined cutting area having a predetermined width extending in the lateral direction. The width (length in the vertical direction) of the planned cutting region can be appropriately selected according to the change in dimensions of the substantially U-shaped reinforcing piece 20 and the like.

  The substantially U-shaped reinforcing piece 20 is disposed between the first and second connection pieces 11 and 12 so as to be separated from them, and one end is connected to the first lead 30 of one unit mounting region 10, The other end is a metal piece that is connected to the second lead 31 of the same unit mounting area 10 and connects the first and second leads 30 and 31 of one unit mounting area 10. That is, one end of the substantially U-shaped reinforcing piece 20 extends, for example, from the first lead 30 as one lead in the direction of the unit mounting region 10 adjacent in the vertical direction, and is at least a unit adjacent in the vertical direction. It is arranged so as to return to the end of the second lead 31 which is the other lead after reaching the predetermined cutting area extending in the lateral direction between the mounting area 10 and the first and second leads 30, 31 are connected.

  The substantially U-shaped reinforcing piece 20 extends from the first lead 30 in the direction of the unit mounting region 10 adjacent in the vertical direction, and the other lead after the lower end of the vertical top exceeds the planned cutting region. It is preferable that the second lead 31 is disposed so as to return to the end. If comprised in this way, both the leg parts of the substantially U-shaped reinforcement piece 20 will be isolate | separated by the cutting | disconnection using a cutting blade, and the short circuit of the 1st, 2nd leads 30 and 31 will be prevented reliably.

  In the present embodiment, the connection position of the substantially U-shaped reinforcing piece 20 with the first lead 30 is the upper end in the vertical direction of the first lead 30 and the first mounting position 10 in the same unit mounting region 10. 2 and the connection position of the substantially U-shaped reinforcing piece 20 with the second lead 31 is the upper end in the vertical direction of the second lead 31. In addition, although it is an end portion on the side facing the first lead 30 in the same unit mounting region 10, it is not limited to this, and is an upper end portion of the first and second leads 30, 31; A position that does not contact the first and second connection pieces 11 and 12 can be appropriately selected. Further, the modification regarding the thickness of the substantially U-shaped reinforcing piece 20 is the same as the modification regarding the thickness of the crank-shaped reinforcing piece 15.

  By comprising as mentioned above, the effect which suppresses a deformation | transformation of the lead frame 4 is acquired. Further, the substantially U-shaped reinforcing piece 20 does not form an acute angle portion between the first and second leads 30 and 31, and does not cross the cutting blade at an acute angle. Therefore, as with the lead frame 1, the lead frame 4 prevents the resin layer from being chipped or cracked when the resin layer is integrally formed. Productivity improvement is achieved by extending the service life and reducing the defective product rate.

  FIG. 12 is a plan view schematically showing a configuration of a main part of a lead frame 4a which is a modified example of the lead frame 4. As shown in FIG. Here, common portions of the lead frames 4 and 4a are denoted by the same reference numerals, and description thereof is omitted. The lead frame 4a is characterized by having a substantially U-shaped reinforcing piece 20a in which a corner portion of the substantially U-shaped reinforcing piece 20 is configured by a curve. The substantially U-shaped reinforcing piece 20a also does not form an acute angle portion between the first and second leads 30, 31 and does not intersect the cutting blade at an acute angle. Therefore, the lead frame 4 a can achieve the same effect as the lead frames 1 and 4.

  Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and can of course be implemented in various forms without departing from the gist of the present invention.

1, 1a, 2, 2a, 3, 3a, 4, 4a Lead frame 10 Unit mounting area 11 First connection piece 12 Second connection piece 13 Third connection piece 15, 15a Crank-shaped reinforcing piece 16 Fourth Connection piece 17, 17a, 19, 19a Substantially L-shaped reinforcement piece 18 Fifth connection piece 20, 20a Substantially U-shaped reinforcement piece 30 First lead 30a First inner lead portion 30b First outer lead portion 31 First 2 lead 31a 2nd inner lead part 31b 2nd outer lead part 40 resin molding 41 resin layer 41a reflective part 41b insulating part 42 recessed part 42a bottom face 43 outer side surface 50 surface mount type light emitting device 51 light emitting element 53, 54 wire bonding

Claims (5)

A plurality of unit mounting areas each including a first lead and a second lead that are spaced apart from each other and arranged in the horizontal direction are arranged at intervals in the vertical and horizontal directions, and the unit mounting areas that are adjacent in the vertical direction are both adjacent to each other. The first leads and the second leads are connected by connecting pieces, and the unit mounting regions adjacent in the horizontal direction are such that one adjacent first lead and the other second lead are connected pieces. A lead frame that is connected and can be separated into individual unit mounting areas by cutting these connection pieces,
Light emission characterized in that in a unit mounting area adjacent in the vertical direction, a first lead in one unit mounting area and a second lead in the other unit mounting area are further connected by a crank-shaped reinforcing piece. Lead frame for device mounting.   The crank-shaped reinforcing piece extends in the longitudinal direction from the first lead of the one unit mounting area, and is used for cutting the connection piece when the individual unit mounting area is separated into pieces. 2. A horizontal extension within a predetermined width of a predetermined cutting area extending in the horizontal direction to pass the cutting blade, and further extending in the vertical direction to be connected to the second lead of the other unit mounting area. Lead frame for mounting light emitting elements. A plurality of unit mounting areas each including a first lead and a second lead that are spaced apart from each other and arranged in the horizontal direction are arranged at intervals in the vertical and horizontal directions, and the unit mounting areas that are adjacent in the vertical direction are both adjacent to each other. The first leads and the second leads are connected by connecting pieces, and the unit mounting regions adjacent in the horizontal direction are such that one adjacent first lead and the other second lead are connected pieces. A lead frame that is connected and can be separated into individual unit mounting areas by cutting these connection pieces,
In the unit mounting areas adjacent to each other in the vertical direction, the connection piece connecting the first lead or the second lead in one unit mounting area and the second leads or the first leads in both unit mounting areas. A position within a predetermined cutting area having a predetermined width extending in the lateral direction, which is intended to pass a cutting blade for cutting a connection piece when the piece is divided between both unit mounting areas. A lead frame for mounting a light emitting element, characterized in that a middle portion that is closer to the other unit mounting region than the region is further connected by a substantially L-shaped reinforcing piece. The lead frame for mounting a light emitting element according to any one of claims 1 to 3 ,
A resin layer formed integrally with the lead frame and having a recess in which the surface of each lead is exposed as a bottom surface;
A resin molded body comprising: A unit mounting region of the light emitting element mounting lead frame according to any one of claims 1 to 3 ,
A resin layer integrally formed in the unit mounting region, and having a recess in which the surface of the unit mounting region is exposed as a bottom surface;
A light-emitting element mounted on the surface of the unit mounting area exposed as a bottom surface of the recess so as to be energized with each lead;
A transparent resin layer made of a transparent resin filled in the recess,
A surface-mounted light-emitting device comprising:

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