WO2006077870A1 - パッケージ型電子部品におけるリード端子の切断方法 - Google Patents
パッケージ型電子部品におけるリード端子の切断方法 Download PDFInfo
- Publication number
- WO2006077870A1 WO2006077870A1 PCT/JP2006/300619 JP2006300619W WO2006077870A1 WO 2006077870 A1 WO2006077870 A1 WO 2006077870A1 JP 2006300619 W JP2006300619 W JP 2006300619W WO 2006077870 A1 WO2006077870 A1 WO 2006077870A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- lead terminal
- cutting
- package
- lead
- narrow bridge
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/004—Details
- H01G9/008—Terminals
- H01G9/012—Terminals specially adapted for solid capacitors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/48—Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer
- H01L21/48—Manufacture or treatment of parts, e.g. containers, prior to assembly of the devices, using processes not provided for in a single one of the subgroups H01L21/06 - H01L21/326
- H01L21/4814—Conductive parts
- H01L21/4821—Flat leads, e.g. lead frames with or without insulating supports
- H01L21/4842—Mechanical treatment, e.g. punching, cutting, deforming, cold welding
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/0001—Technical content checked by a classifier
- H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
- H05K3/32—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
- H05K3/34—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by soldering
- H05K3/341—Surface mounted components
- H05K3/3421—Leaded components
- H05K3/3426—Leaded components characterised by the leads
Definitions
- the present invention relates to a method for manufacturing an electronic component having a resin package.
- the present invention relates to a method of cutting a lead terminal that also protrudes with a grease packaging force.
- the electronic component here is, for example, a capacitor or a semiconductor integrated circuit.
- Patent Document 1 discloses a solid electrolytic capacitor which is an example of a package type electronic component.
- the solid electrolytic capacitor includes a thermosetting synthetic resin package, and an anode lead terminal and a cathode lead terminal that also project this knocking force.
- a capacitor element is provided in the package. This capacitor element is formed on a tip made of a metal material having a valve action (hereinafter simply referred to as “valve action metal”), an anode rod protruding from one end face of the tip, and an outer peripheral face of the tip.
- valve action metal a metal material having a valve action
- Cathode film The anode rod and the cathode film are connected to the anode lead terminal and the cathode lead terminal, respectively.
- the conventional solid electrolytic capacitor is manufactured as follows. First, a lead frame having a predetermined pattern is prepared.
- the lead frame includes two support rails extending in parallel to each other and a plurality of pairs of lead terminals (an anode lead terminal and a cathode lead terminal) provided between the support rails. In each pair, the anode lead terminal and the cathode lead terminal are provided so as to face each other.
- a metal plating layer (for example, a solder plating layer) is formed on the anode lead terminal and the cathode lead terminal by plating.
- a capacitor element is arranged between each anode lead terminal and the corresponding cathode lead terminal.
- the anode rod is fixed to the anode lead terminal and the cathode film is fixed to the cathode lead terminal so as to be electrically connected.
- the entire capacitor element is sealed with a resin package.
- each lead terminal that also has a protruding / cage force is cut. Cutting is performed using a cutting punch that can be moved up and down. In this way, it is separated from the support rail A solid electrolytic capacitor is obtained.
- both lead terminals protruding from the package are soldered to the printed circuit board.
- the lead terminal on which the soldering layer has been formed in advance is cut with a cutting punch. For this reason, the front end surface of each lead terminal, that is, the surface cut by the punch is not covered with the soldering layer. As a result, there was a problem that sufficient mounting strength could not be obtained when mounting a solid electrolytic capacitor with a solder on the tip surface of each lead terminal on a printed circuit board.
- Patent Document 1 Japanese Unexamined Patent Application Publication No. 2004-172527
- An object of the present invention is to provide a method for cutting a lead terminal of a knock-type electronic component that can solve the above-described problems.
- a resin package an element covered with the knocker, and a lead terminal including a protrusion that is electrically connected to the element and protrudes outside the package force.
- a method for cutting lead terminals of a packaged electronic component includes a step of forming a narrow bridge portion on the lead terminal by removing a part of the projecting portion, a step of applying a metal sticking process to the projecting portion, and a position of the narrow bridge portion. And cutting the lead terminal.
- the narrow bridge portion can be provided by forming a notch, a through hole or the like in the projecting portion of the lead terminal.
- the metal fitting process is performed on the protruding portion. . Thereafter, the lead terminal is cut at the position of the narrow bridge portion. As a result, the metal plating layer can remain on the cut lead terminals on the top surface, the bottom surface, and a part of the tip surface that consists of only the two side surfaces.
- the lead terminal is cut using a cutting punch and a receiving die.
- the cutting punch includes a cutting function part that contacts the lead terminal and a non-cutting function part that does not contact the lead terminal.
- the cutting function unit may project toward the package with the non-cutting function unit as a reference.
- Such a configuration can be realized by forming a recess on the cut surface side of the cutting punch.
- the portion of the narrow bridge portion that is closest to the cage is cut.
- the leading end surface of the lead terminal after cutting is flat with the cut surface (the surface on which a part of the lead terminal is directly exposed) and the covering surface covered with the metal plating layer. It becomes a surface. That is, there is no step or protrusion on the tip surface of the lead terminal.
- the metal adhesive layer covering the leading end side of the lead terminal and the solder paste applied to the printed circuit board or the like can be easily adapted.
- FIG. 1 is a cross-sectional view showing a solid electrolytic capacitor manufactured by using the method according to the first embodiment of the present invention.
- FIG. 2 is a perspective view showing the bottom side of the solid electrolytic capacitor of FIG. 1.
- FIG. 3 is a perspective view showing a lead frame used for manufacturing the solid electrolytic capacitor of FIG. 1.
- FIG. 4A is a partial cross-sectional view for explaining the method according to the first embodiment of the present invention
- FIG. 4B is a cross-sectional view taken along the line IVb-IVb in FIG. 4A.
- FIG. 5 is a diagram illustrating a method based on the second embodiment of the present invention, and is a cross-sectional view corresponding to FIG. 4B.
- FIG. 6 is a diagram illustrating a method based on the third embodiment of the present invention, and is a sectional view corresponding to FIG. 4B.
- FIGS. 1 to 4B schematically show the configuration of a packaged electronic component obtained using this method! / Speak.
- the illustrated electronic component is a solid electrolytic capacitor, this is merely an example, and the application target of the present invention is not limited to a solid electrolytic capacitor.
- a solid electrolytic capacitor 1 includes a capacitor element 2, a pair of lead terminals 3 (an anode lead terminal 3a and a cathode lead terminal 3b), and a package 5 made of a thermosetting synthetic resin. And. Each lead terminal also has a metal plate force. The knocker 5 seals the entire capacitor element 2. Each lead terminal 3 is partly covered by the package 5 but partly exposed to the outside of the package 5 (see also FIG. 2). Each lead terminal 3 protrudes from the knock 5 in the horizontal direction.
- the capacitor element 2 includes a chip 6 and an anode rod 7 protruding from one end face (right end face in FIG. 1) of the chip.
- Tip 6 is a porous body made by sintering a powder of valve action metal such as tantalum.
- the anode rod 7 is also made of a valve metal.
- a dielectric film with high electrical insulation is formed on the force chip 6 not shown in the figure.
- a solid electrolyte layer is formed on the chip 6 (more precisely, on the dielectric film) except for the right end face. Further, a cathode film 8 is formed on the solid electrolyte layer.
- a standing connection piece 9 is welded to the anode lead terminal 3a. Such an upright portion may be formed by partially bending the anode lead terminal 3a.
- the connection piece 9 is fixed to the anode rod 7 of the capacitor element 2 so as to be electrically conductive by a conductive paste or a cream solder.
- the upper surface portion of the cathode lead terminal 3 is fixed to the cathode film 8 so as to be electrically conducted by conductive paste, cream solder or welding.
- a lead frame 11 as shown in FIG. 3 is prepared by punching one metal sheet.
- the lead frame 11 includes a pair of support rails 12 extending in parallel to each other and a plurality of pairs of lead terminals (anode lead terminals and cathode lead terminals) 3 (FIG. 3). Here, only a pair of lead terminals 3 is shown).
- the plurality of pairs of lead terminals 3 are spaced apart from each other by a predetermined distance in the longitudinal direction of the support rail 12.
- Each lead terminal 3 is configured to face the other corresponding lead terminal 3 by extending at right angles from one support rail to the other support rail.
- Each lead terminal 3 is formed with a through-hole 13 that penetrates the terminal in the vertical direction. As shown in FIG. 3, each through hole 13 is located outside the package 5 to be formed later.
- Each through hole 13 is sandwiched by a pair of narrow bridge portions 23 from both sides.
- an upward connecting piece 9 is welded to the free end portion of the anode lead terminal 3.
- Such an upward connection portion may be formed by bending the free end portion of the anode lead terminal 3.
- a metal plating process is applied to each lead terminal 3 to provide a nickel plating layer (not shown) as an underlayer and a metal plating layer 15 having excellent solder wettability (Fig. 1). See).
- the metal plating layer 15 also has, for example, tin and solder strength.
- Such metal plating may be performed on the entirety of each lead terminal 3 or only on a part thereof. However, in the latter case, it is necessary to perform the nail treatment on at least a portion of the lead terminal 3 that protrudes outward from the knock 5.
- the inner wall surface of each through hole 13 is also covered with the metal plating layer 15.
- the capacitor element 2 is disposed between the pair of lead terminals 3, and the positive electrode rod 7 and the connection piece 9 are brought into contact with each other. Then, the anode rod 7 is fixed to the connection piece 9 and the cathode film 8 is fixed to the cathode lead terminal 3 so as to be electrically connected with a conductive paste or cream solder.
- Package 5 that covers the entire capacitor element 2 is formed.
- Package 5 can be formed by the following method. First, a mold (not shown) having a cavity with a predetermined size is placed on the upper surface of the lead frame 11. At this time, the capacitor element 2 is accommodated in the cavity of the mold. Next, a liquid thermosetting synthetic resin is poured into the cavity until the capacitor element 2 is completely immersed. Finally, the cage 5 is formed by curing the supplied grease.
- the above-described metal plating process for the lead terminals 3 may be performed after the package forming process. In this case, the base layer and the metal plating layer 15 are exposed portions of the lead terminals 3 (portions covered by the package 5). Will be formed.
- each narrow bridge portion 23 is cut using a cutting punch 17 that can be moved up and down (cutting step).
- the finished product of the solid electrolytic capacitor 1 (see FIGS. 1 and 2) is separated from the pair of support rails 12.
- each cutting punch 17 has two cutting action surfaces 18 separated by a recess 19, and each cutting action surface 18 is a non-cutting action surface (the bottom surface of the recess 19). Projecting forward (in the direction toward the package 5). According to such a configuration, it is possible to leave the region S (see FIG. 2) where the metal plating layer 15 (and the underlying layer) is formed on the cut surface of each lead terminal 3. As understood from FIGS. 3 and 4B, the region S corresponds to one surface located on the package 5 side among the four inner wall surfaces of the through hole 13. As shown in FIG. 2, the region S constitutes a part of the distal end surface of the lead terminal 3 and is located between the exposed surfaces C (the portion where the metal plating layer 15 is formed).
- the cutting action surface 18 of the cutting punch 17 cuts the lead terminal 3. At this time, the cutting surface
- the width of the recess 19 (the dimension measured in the vertical direction in FIG. 4B) is set to be the same as or substantially the same as the width of the through hole 13.
- each lead terminal 3 separated from the support rail 12 is a flat surface composed of two exposed surfaces C and a region S covered with a metal plating layer, as shown in FIG. is there. That is, the exposed surface C and the region S are flush with each other.
- both lead terminals 3 protruding in the opposite directions from the package 5 are soldered to the printed circuit board.
- each lead terminal 3 After being separated from the support rail 12, each lead terminal 3 has a top surface, a bottom surface, and a part of the tip surface (region S) formed by only two side surfaces. It will be in the state covered by.
- the presence of the region S improves the solder wettability of the tip surface. That Therefore, when mounting the solid electrolytic capacitor 1 on the printed circuit board, in addition to the top, bottom, and two side surfaces of the lead terminal 3, the tip surface is also properly fixed to the printed circuit board via solder. Is done. Therefore, the mounting strength of the solid electrolytic capacitor 1 on the printed circuit board is improved.
- the recess 19 formed in the cutting punch 17 is between the cut surfaces of the lead terminals 3 (exposed surface C in FIG. 2) of the inner wall surface of the through-hole 13. It corresponds to region S in position. Accordingly, the cutting action surface 18 of the cutting punch 17 does not rub against the region S during the cutting operation by the cutting punch 17. Thereby, it is possible to reliably prevent the metal plating layer 15 in the region S from being scraped off by the cutting punch 17. As a result, the production yield of the solid electrolytic capacitor 1 can be improved.
- each narrow bridge portion 23 By cutting each narrow bridge portion 23 using the cutting punch 17 and the receiving die 16, the tip surface of each lead terminal 3 can be made flat as shown in FIG. It is. In this configuration, there is no protrusion or the like in the vicinity of the metal plating layer 15 on the flat surface, and therefore, the solder applied to the metal plating layer 15 on the tip surface of each lead terminal 3 and the printed circuit board. The paste becomes easy to become familiar, and the mounting strength of the solid electrolytic capacitor 1 on the printed circuit board is improved.
- narrow bridge portions 23 exist on both sides of the through hole 13 of each lead terminal 3. For this reason, these two narrow bridge portions 23 can prevent the molten synthetic resin from entering the through holes 13 when the package 5 is molded (during the packaging process). Therefore, the removal of the grease burrs from the tip surfaces of the lead terminals 3 becomes unnecessary after molding the knocker 5.
- the through hole 13 is formed in each lead terminal 3 before the package 5 is molded.
- the cut cross-sectional area can be reduced. This reduces the impact during cutting and reduces the The adverse effect on the adhesion of the card terminal 3 can also be reduced.
- FIG. 5 is a diagram for explaining a method of cutting a lead terminal according to the second embodiment of the present invention.
- there is one narrow bridge portion of each lead terminal in the lead frame (see reference numeral 23 'in the figure).
- Such a narrow bridge portion can be formed by drilling notches 13 'communicating vertically with both longitudinal side edges of each lead terminal 3.
- the pair of notches 13 ′ formed in each lead terminal 3 is provided at a location on the outside of the knocker 5. In the present invention, only one such notch may be provided in each lead terminal 3.
- each of the lead terminals 3 of the second embodiment is also subjected to metal plating.
- This staking process may be performed either before or after the packaging process.
- the narrow bridge portion 23 ′ is cut using the cutting punch 17 that can move up and down while supporting the downward force by the receiving die 16 with the knock 5. .
- This cutting is performed on the narrow bridge portion 23 'close to the package 5. In this way, the finished product of the solid electrolytic capacitor 1 is separated from the support rail 12 of the lead frame 11.
- each cutting punch 1 has a plurality of (in the illustrated example, two) concave portions W formed therein.
- the cutting punch 1 has two non-cutting functional surfaces and a cutting functional surface 18 ′ sandwiched between these non-cutting functional surfaces.
- the cutting functional surface 18 ′ protrudes forward from the non-cutting functional surface.
- the cutting functional surface 18 ′ of the cutting punch 1 is configured not to contact the front inner wall surface (the inner wall surface on the side of the knocker 5) in both cutouts W.
- the width of the cutting functional surface 18 ⁇ (the dimension measured in the vertical direction in Fig. 5) is set to be substantially the same as the width of the narrow bridge 23 '.
- a metal sticking layer can be left on the tip surface of each lead terminal 3, and the mounting strength on a printed circuit board or the like can be improved. Can do.
- two metal plating layers that are separated from each other remain on the distal end surface of the lead terminal 3.
- FIG. 6 is a view for explaining a third embodiment of the present invention.
- the first embodiment Similarly to the case, a through hole 13 is provided.
- the cutting punch 17 ′ ′ of the third embodiment has a generally flat cutting functional surface 18 ′ ′ and is not provided with a recess. Even in such a configuration, the cutting functional surface 18 ′ ′ cuts the narrow-width bridge portion 23, but does not contact the inner wall surface on the side of the package 5 in the through hole 13 (metal plating layer forming region S). It is possible to set the cutting position. Specifically, as shown in FIG. 6, the cutting function surface 18 ′ ′ force may be set so as to be appropriately separated from the inner wall surface of the through-hole 13 in the rear direction (direction away from the package 5).
- the cut surface of the lead terminal 3 and the metal plating layer forming region S can be substantially flush with each other. Further, the third embodiment is advantageous in that it is not necessary to prepare a cutting punch having a complicated shape.
- the electronic component to which the present invention is applied is not limited to the solid electrolytic capacitor described above, and may be one having three or more lead terminals such as a transistor.
- the semiconductor chip and each lead terminal do not need to be directly connected, for example, they may be connected by wire bonding using a thin metal wire.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005-014351 | 2005-01-21 | ||
JP2005014351A JP2008117793A (ja) | 2005-01-21 | 2005-01-21 | パッケージ型電子部品におけるリード端子の切断方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006077870A1 true WO2006077870A1 (ja) | 2006-07-27 |
Family
ID=36692259
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2006/300619 WO2006077870A1 (ja) | 2005-01-21 | 2006-01-18 | パッケージ型電子部品におけるリード端子の切断方法 |
Country Status (5)
Country | Link |
---|---|
JP (1) | JP2008117793A (ja) |
KR (1) | KR20070094654A (ja) |
CN (1) | CN101107687A (ja) |
TW (1) | TWI274357B (ja) |
WO (1) | WO2006077870A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008258602A (ja) * | 2007-03-09 | 2008-10-23 | Nec Tokin Corp | 固体電解コンデンサ及びその製造方法 |
JP2009231314A (ja) * | 2008-03-19 | 2009-10-08 | Matsuo Electric Co Ltd | チップ形コンデンサ |
JP2010135715A (ja) * | 2008-12-08 | 2010-06-17 | Samsung Electro-Mechanics Co Ltd | 固体電解コンデンサ |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPWO2017141844A1 (ja) * | 2016-02-19 | 2018-12-06 | パナソニックIpマネジメント株式会社 | コンデンサおよびコンデンサの製造方法 |
CN107824953B (zh) * | 2017-09-06 | 2020-06-19 | 木林森股份有限公司 | 一种采用感应加热焊接技术生产led照明产品的方法 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004140156A (ja) * | 2002-10-17 | 2004-05-13 | Rohm Co Ltd | パッケージ型電子部品におけるリード端子の切断方法 |
JP2005000552A (ja) * | 2003-06-13 | 2005-01-06 | Olympus Corp | カプセル内視鏡 |
-
2005
- 2005-01-21 JP JP2005014351A patent/JP2008117793A/ja active Pending
-
2006
- 2006-01-18 CN CNA2006800028104A patent/CN101107687A/zh active Pending
- 2006-01-18 KR KR1020077018282A patent/KR20070094654A/ko not_active Application Discontinuation
- 2006-01-18 WO PCT/JP2006/300619 patent/WO2006077870A1/ja not_active Application Discontinuation
- 2006-01-20 TW TW095102334A patent/TWI274357B/zh not_active IP Right Cessation
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004140156A (ja) * | 2002-10-17 | 2004-05-13 | Rohm Co Ltd | パッケージ型電子部品におけるリード端子の切断方法 |
JP2005000552A (ja) * | 2003-06-13 | 2005-01-06 | Olympus Corp | カプセル内視鏡 |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008258602A (ja) * | 2007-03-09 | 2008-10-23 | Nec Tokin Corp | 固体電解コンデンサ及びその製造方法 |
JP2009231314A (ja) * | 2008-03-19 | 2009-10-08 | Matsuo Electric Co Ltd | チップ形コンデンサ |
KR101554195B1 (ko) * | 2008-03-19 | 2015-09-18 | 마쓰오덴기가부시끼가이샤 | 칩형 콘덴서 |
JP2010135715A (ja) * | 2008-12-08 | 2010-06-17 | Samsung Electro-Mechanics Co Ltd | 固体電解コンデンサ |
Also Published As
Publication number | Publication date |
---|---|
KR20070094654A (ko) | 2007-09-20 |
JP2008117793A (ja) | 2008-05-22 |
TWI274357B (en) | 2007-02-21 |
TW200629315A (en) | 2006-08-16 |
CN101107687A (zh) | 2008-01-16 |
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