JP4910100B2 - Metal case for electronic components - Google Patents
Metal case for electronic components Download PDFInfo
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- JP4910100B2 JP4910100B2 JP2006186551A JP2006186551A JP4910100B2 JP 4910100 B2 JP4910100 B2 JP 4910100B2 JP 2006186551 A JP2006186551 A JP 2006186551A JP 2006186551 A JP2006186551 A JP 2006186551A JP 4910100 B2 JP4910100 B2 JP 4910100B2
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- 229910052751 metal Inorganic materials 0.000 title claims description 79
- 239000002184 metal Substances 0.000 title claims description 79
- 239000007769 metal material Substances 0.000 claims description 7
- 239000003990 capacitor Substances 0.000 description 12
- 238000000034 method Methods 0.000 description 11
- 229910052782 aluminium Inorganic materials 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 230000001678 irradiating effect Effects 0.000 description 3
- 238000005498 polishing Methods 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 208000032005 Spinocerebellar ataxia with axonal neuropathy type 2 Diseases 0.000 description 1
- 229910009372 YVO4 Inorganic materials 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 208000033361 autosomal recessive with axonal neuropathy 2 spinocerebellar ataxia Diseases 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010330 laser marking Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
- B41M5/262—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used recording or marking of inorganic surfaces or materials, e.g. glass, metal, or ceramics
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/24—Ablative recording, e.g. by burning marks; Spark recording
Landscapes
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Laser Beam Processing (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Description
本発明は、電解コンデンサ、電気２重層コンデンサ、電気化学キャパシタ、電池等の電子部品に用いられる金属ケースに関する。 The present invention relates to a metal case used for electronic parts such as an electrolytic capacitor, an electric double layer capacitor, an electrochemical capacitor, and a battery.
従来、電解コンデンサや電池等の電子部品の外装として用いられる金属ケースなどの金属材料の外表面に文字や図形等を印字する際には、特許文献１に記載のレーザマーキング方法のように、レーザマーキング装置から発せられるレーザを対象部材（金属ケース）の表面に照射することで、マーキング（印字）するようにしている。この印字部分には、予め機械研磨されている。 Conventionally, when characters, figures, etc. are printed on the outer surface of a metal material such as a metal case used as an exterior of an electronic component such as an electrolytic capacitor or a battery, the laser marking method described in Patent Document 1 is used. Marking (printing) is performed by irradiating the surface of the target member (metal case) with a laser emitted from the marking device. This printed portion is previously mechanically polished.
また、特許文献２に記載の金属層へのマーク付け方法のように、表面に微細な凹凸を有する金属層にレーザービームを照射することにより、金属層の表面に滑らかな面を形成するようにしており、この滑らかな面でマーク（文字や図形）を印字しているものもある。 In addition, as in the method for marking a metal layer described in Patent Document 2, a smooth surface is formed on the surface of the metal layer by irradiating a metal layer having fine irregularities on the surface with a laser beam. Some of them have marks (characters and figures) printed on this smooth surface.
しかしながら、特許文献１及び２にあっては、金属材料（金属ケース）の外表面にレーザ照射を行うことにより、耐食性に優れた印字を行うことはできるが、外表面における印字された部位の周囲は、微細な凹凸により光の反射濃度が不均一になっており、金属材料を肉眼で視認したときに、印字された文字や図形が不均一な光の反射によって見え難くなってしまうという問題があった。特に特許文献１において、表面を機械研磨によって処理する場合、機械研磨によって切粉等が発生し、洗浄等が必要となり、工程が複雑化してしまう。 However, in Patent Documents 1 and 2, it is possible to perform printing with excellent corrosion resistance by irradiating the outer surface of the metal material (metal case) with laser, but around the printed portion on the outer surface. The light reflection density is uneven due to fine irregularities, and when the metal material is viewed with the naked eye, printed characters and figures are difficult to see due to uneven light reflection. there were. In particular, in Patent Document 1, when the surface is processed by mechanical polishing, chips and the like are generated by mechanical polishing, and cleaning or the like is required, which complicates the process.
本発明は、このような問題点に着目してなされたもので、レーザ照射によって金属ケースの外表面に印字された文字や図形を明確に視認することができる電子部品の金属ケースを提供することを目的とする。 The present invention has been made paying attention to such problems, and provides a metal case of an electronic component that can clearly see characters and figures printed on the outer surface of the metal case by laser irradiation. With the goal.
前記課題を解決するために、本発明の請求項１に記載の電子部品の金属ケースは、金属材料で形成され、外表面が不均一な微細な凹凸形状をなし、電子部品の外装として用いられる電子部品の金属ケースであって、前記外表面の少なくとも一部に、レーザ照射によって均一な深さ及び均一な間隔に形成される複数の第１凹部によって下地領域を形成するとともに、該下地領域内に、レーザ照射によって形成され、かつ光の反射濃度が前記第１凹部と異なる第２凹部によって文字や図形を印字したことを特徴としている。
この特徴によれば、レーザ照射を用いることで、所望の領域に細かな第１凹部を均一な深さ及び均一な間隔に精度良く形成できるとともに、さらにレーザ照射にて、第２凹部を容易に形成できるとともに、金属ケースの外表面において、第２凹部により印字された文字や図形の周囲が、複数の第１凹部によって均一な深さ及び均一な間隔に形成された下地領域となり、かつ印字された文字や図形と下地領域との光の反射濃度が異なるため、金属ケースの外表面を肉眼で視認したときに、印字された文字や図形を明確に視認することができる。
In order to solve the above-mentioned problem, the metal case of the electronic component according to claim 1 of the present invention is formed of a metal material, has a fine uneven shape with an uneven outer surface, and is used as an exterior of the electronic component. A metal case for an electronic component, wherein a base region is formed on at least a part of the outer surface by a plurality of first recesses formed at a uniform depth and a uniform interval by laser irradiation. In addition, a character or a figure is printed by a second recess formed by laser irradiation and having a light reflection density different from that of the first recess.
According to this feature, by using laser irradiation, fine first recesses can be accurately formed in a desired region at a uniform depth and a uniform interval , and the second recesses can be easily formed by laser irradiation. It can be formed, and on the outer surface of the metal case, the periphery of the characters and figures printed by the second recesses becomes a base region formed at a uniform depth and a uniform interval by the plurality of first recesses and printed. Since the reflection density of light differs between the letters and figures and the ground area, the printed letters and figures can be clearly seen when the outer surface of the metal case is visually recognized.
本発明の請求項２に記載の電子部品の金属ケースは、請求項１に記載の電子部品の金属ケースであって、
前記第２凹部を前記第１凹部よりも深くなるように形成することで、前記反射濃度を異ならせることを特徴としている。
この特徴によれば、第２凹部が第１凹部よりも光を吸収し易くなり、第２凹部によって印字された文字や図形の明度が、第１凹部によって形成された下地領域よりも暗くなり、文字や図形と下地領域とのコントラストを明確にできる。
The metal case of the electronic component according to claim 2 of the present invention is the metal case of the electronic component according to claim 1,
The reflection density is varied by forming the second recess so as to be deeper than the first recess.
According to this feature, the second concave portion absorbs light more easily than the first concave portion, and the brightness of characters and figures printed by the second concave portion is darker than the ground region formed by the first concave portion, The contrast between characters and figures and the background area can be clarified.
本発明の請求項３に記載の電子部品の金属ケースは、請求項１または２に記載の電子部品の金属ケースであって、
前記複数の第１凹部の直径が１００μｍ以下となっており、前記レーザ照射の走査によって前記下地領域を形成することを特徴としている。
この特徴によれば、レーザ照射の走査によって直径が１００μｍ以下という細かな第１凹部が、金属ケースの外表面に均一に並べられた状態で形成されるため、金属ケースを肉眼で視認したときに、複数の第１凹部で形成される下地領域が均一の反射濃度となり、かつ滑らかな面となって視認されるようになり、第２凹部によって印字された文字や図形を明確に視認することができる。
The metal case of the electronic component according to claim 3 of the present invention is the metal case of the electronic component according to claim 1 or 2,
The plurality of first recesses have a diameter of 100 μm or less, and the base region is formed by scanning with the laser irradiation.
According to this feature, the fine first recesses having a diameter of 100 μm or less formed by laser irradiation scanning are formed in a state of being uniformly arranged on the outer surface of the metal case. The base region formed by the plurality of first recesses has a uniform reflection density and is visually recognized as a smooth surface, and the characters and figures printed by the second recesses can be clearly viewed it can.
本発明に係る電子部品の金属ケースを実施するための最良の形態を実施例に基づいて以下に説明する。 BEST MODE FOR CARRYING OUT THE INVENTION The best mode for carrying out a metal case of an electronic component according to the present invention will be described below based on examples.
本発明の実施例を図面に基づいて説明すると、先ず図１は、金属ケースの外表面に下地領域を形成している状態を示す正面図であり、図２は、金属ケースの外表面に文字を印字している状態を示す正面図であり、図３（ａ）は、金属ケースの外表面を示す拡大断面図であり、図３（ｂ）は、外表面に下地領域を形成している状態を示す拡大断面図であり、図３（ｃ）は、外表面に文字を印字している状態を示す拡大断面図であり、図４は、印字された金属ケースの外表面を示す拡大正面図であり、図５（ａ）は、図４における金属ケースの外表面を示すＡ−Ａ拡大断面図であり、図５（ｂ）は、図４における金属ケースの外表面を示すＢ−Ｂ拡大断面図であり、図６は、本実施例の印字方法を用いた金属ケースの外表面を示す写真であり、図７は、従来の印字方法を用いた金属ケースの外表面を示す写真である。 An embodiment of the present invention will be described with reference to the drawings. First, FIG. 1 is a front view showing a state in which a base region is formed on the outer surface of a metal case, and FIG. 2 is a character on the outer surface of the metal case. FIG. 3A is an enlarged cross-sectional view showing the outer surface of the metal case, and FIG. 3B shows a base region formed on the outer surface. FIG. 3C is an enlarged sectional view showing a state in which characters are printed on the outer surface, and FIG. 4 is an enlarged front view showing the outer surface of the printed metal case. 5 (a) is an AA enlarged sectional view showing the outer surface of the metal case in FIG. 4, and FIG. 5 (b) is a BB showing the outer surface of the metal case in FIG. FIG. 6 is an enlarged cross-sectional view, and FIG. 6 is a photograph showing an outer surface of a metal case using the printing method of the present embodiment. Is a photograph showing the outer surface of the metal case with conventional printing methods.
図１の符号１は、本発明における電子部品としてのコンデンサであり、このコンデンサ１は、アルミニウムやアルミニウム合金等の金属材料で形成された金属ケース２で外装されている。この金属ケース２は板状のアルミニウム部材がプレス加工によって有底円筒体形状をなすように形成されている。なお、円盤形状の金属スラグをインパクト成形加工により外周縁を突出させて形成された金属ケースを用いても良い。 Reference numeral 1 in FIG. 1 denotes a capacitor as an electronic component in the present invention, and the capacitor 1 is packaged with a metal case 2 formed of a metal material such as aluminum or an aluminum alloy. The metal case 2 is formed such that a plate-like aluminum member has a bottomed cylindrical shape by pressing. In addition, you may use the metal case formed by projecting the outer periphery of the disk-shaped metal slag by impact molding.
金属ケース２の外周表面３には、コンデンサ１の製品番号を示す文字４を印字できるようになっており、この印字方法について説明する。図１に示すように、コンデンサ１の近傍にレーザ照射装置５を設置し、このレーザ照射装置５から発射されるレーザ光線を、コンデンサ１を外装する金属ケース２の外表面３に照射できるようになっている。レーザ照射装置５から照射されたレーザ光は、図示しないレーザ反射板を介して金属ケース２の表面に照射され、このレーザ照射板の照射角度を適宜設定することで、金属ケース２表面の所望の位置に照射可能となる。 Characters 4 indicating the product number of the capacitor 1 can be printed on the outer peripheral surface 3 of the metal case 2, and this printing method will be described. As shown in FIG. 1, a laser irradiation device 5 is installed in the vicinity of the capacitor 1 so that a laser beam emitted from the laser irradiation device 5 can be applied to the outer surface 3 of the metal case 2 that covers the capacitor 1. It has become. The laser beam irradiated from the laser irradiation device 5 is irradiated onto the surface of the metal case 2 via a laser reflector (not shown), and the irradiation angle of the laser irradiation plate is appropriately set, so that a desired surface of the metal case 2 can be obtained. The position can be irradiated.
レーザ照射装置５は、ＹＶＯ４レーザ光線を発射するようになっており、レーザ光線のレーザパワー、レーザ周波数を適宜設定し、またレーザスポット径は約４０μｍとなっている。尚、レーザ光線のレーザスポット径は１００μｍ以下のものが好ましい。 The laser irradiation device 5 emits a YVO4 laser beam, appropriately sets the laser power and laser frequency of the laser beam, and has a laser spot diameter of about 40 μm. The laser spot diameter of the laser beam is preferably 100 μm or less.
図３（ａ）に示すように、金属ケース２が板状のアルミニウム部材がプレス加工により形成されるために、レーザ照射前の金属ケース２の外表面３には、微細な凹凸形状が形成されている。この凹凸形状によって光の反射濃度が不均一になっており、肉眼で金属ケース２の外表面３を見たときに、微細な斑模様になっている（図７参照）。 As shown in FIG. 3 (a), since the metal case 2 is formed by pressing a plate-shaped aluminum member, a fine uneven shape is formed on the outer surface 3 of the metal case 2 before laser irradiation. ing. Due to the uneven shape, the reflection density of light is non-uniform, and when the outer surface 3 of the metal case 2 is viewed with the naked eye, a fine spot pattern is formed (see FIG. 7).
図１に示すように、金属ケース２の外表面３に下地領域６を形成する際には、レーザ光線の金属ケース２の外表面３に照射する。また、レーザ光線は一定の走査スピード及び一定の走査幅で走査されるようになっており、外表面３におけるレーザ光線が照射された部位には、直径αが約４０μｍの多数の第１凹部７（図５参照）が均一な深さ及び均一な間隔で形成されるようになっている。尚、第１凹部７の直径αは１００μｍ以下のものが好ましい。 As shown in FIG. 1, when forming the base region 6 on the outer surface 3 of the metal case 2, the outer surface 3 of the metal case 2 is irradiated with a laser beam. Further, the laser beam is scanned at a constant scanning speed and a constant scanning width, and a large number of first recesses 7 having a diameter α of about 40 μm are applied to the portion of the outer surface 3 irradiated with the laser beam. (See FIG. 5) are formed at a uniform depth and a uniform interval. The first recess 7 preferably has a diameter α of 100 μm or less.
図３（ｂ）に示すように、レーザ照射によって金属ケース２の外表面３に多数の第１凹部７、すなわち一定の深さの下地領域６を形成する。金属ケース２の外表面３における下地領域６が形成された部位は、第１凹部７が均一な深さ及び均一な間隔で形成されているため、光の反射濃度が均一になっており、肉眼で金属ケース２の外表面３を見たときに、斑の少ない状態となっている（図６参照）。 As shown in FIG. 3B, a large number of first recesses 7, that is, base regions 6 having a certain depth, are formed on the outer surface 3 of the metal case 2 by laser irradiation. In the portion of the outer surface 3 of the metal case 2 where the base region 6 is formed, the first concave portions 7 are formed at a uniform depth and a uniform interval, so that the reflection density of light is uniform, and the naked eye When the outer surface 3 of the metal case 2 is viewed, there are few spots (see FIG. 6).
図１に示すように、金属ケース２の外表面３には、多数の第１凹部７が均一な深さ及び均一な間隔で配列され、これらの第１凹部７が矩形状に配置されることで、金属ケース２の外表面３に下地領域６が形成されている。尚、レーザ光線の走査時には、１ｍｍ当たり約２２個の第１凹部７が外表面３に形成されるようになっている（図４参照）。 As shown in FIG. 1, a large number of first recesses 7 are arranged on the outer surface 3 of the metal case 2 at a uniform depth and a uniform interval, and these first recesses 7 are arranged in a rectangular shape. Thus, the base region 6 is formed on the outer surface 3 of the metal case 2. When scanning with a laser beam, about 22 first recesses 7 per 1 mm are formed on the outer surface 3 (see FIG. 4).
図２に示すように、金属ケース２の外表面３に文字４を印字する際には、下地領域６を形成したときと同じレーザ照射装置５を用いて行うことができる。先ずレーザ照射装置５のレーザパワー、レーザ周波数、レーザスポット径を、前述した下地領域６の形成の際と同一の設定にしておく。 As shown in FIG. 2, when the character 4 is printed on the outer surface 3 of the metal case 2, the same laser irradiation device 5 as that when the base region 6 is formed can be used. First, the laser power, the laser frequency, and the laser spot diameter of the laser irradiation apparatus 5 are set to the same settings as those in the formation of the base region 6 described above.
更に、レーザ光線の金属ケース２の外表面３に対する走査スピードを、下地領域６を形成したときとよりも遅く設定して下地領域６内に照射する。レーザ光線は一定の走査スピードで走査されるようになっており、下地領域６におけるレーザ光線が照射された部位には、直径αが約４０μｍの多数の第２凹部８（図５参照）が溝状に配置されることで、文字４が印字されるようになっている。 Further, the scanning speed of the laser beam with respect to the outer surface 3 of the metal case 2 is set slower than when the base region 6 is formed, and the base region 6 is irradiated. The laser beam is scanned at a constant scanning speed, and a number of second recesses 8 (see FIG. 5) having a diameter α of about 40 μm are grooves in the portion of the base region 6 irradiated with the laser beam. The character 4 is printed by being arranged in a shape.
図３（ｃ）に示すように、文字４を印字するときのレーザ光線の走査速度が下地領域６を形成するときの走査速度よりも遅くなっていることで、第２凹部８（文字４）の深さが第１凹部７（下地領域６）の深さよりも深くなるように形成される。そのため第２凹部８は、光の反射濃度が第１凹部７と異なっている。 As shown in FIG. 3C, the second concave portion 8 (character 4) is obtained because the scanning speed of the laser beam when printing the character 4 is slower than the scanning speed when forming the base region 6. Is deeper than the depth of the first recess 7 (the base region 6). Therefore, the second recess 8 is different from the first recess 7 in the light reflection density.
また、金属ケース２の外表面３における文字４が印字された部位は、第２凹部８の深さが第１凹部７の深さよりも深く、また適度な凹凸形状を成しているので、下地領域６よりも光を吸収し易くなっており、肉眼で金属ケース２の外表面３を見たときに、文字４の部位が黒っぽく見えるようになっている（図６参照）。 Further, the portion on which the character 4 is printed on the outer surface 3 of the metal case 2 has a depth of the second recess 8 larger than that of the first recess 7 and has an appropriate uneven shape. It is easier to absorb light than the region 6, and when the outer surface 3 of the metal case 2 is viewed with the naked eye, the portion of the character 4 looks dark (see FIG. 6).
図４及び図５（ａ）に示すように、下地領域６は、均一な直径αをなす多数の第１凹部７が集合されることで、全体的にほぼ平坦面をなすように形成されている。また、図５（ｂ）に示すように、文字４は、溝状の第２凹部８が２列並んで形成され、第２凹部８の幅βは、レーザスポット径とほぼ同じ４０μｍとなっている。尚、第２凹部８の列の数を増やすことで文字４を太く印字することができる。更に、レーザ照射装置５を用いることで、文字４の印字のみならず、コンデンサ１の製造メーカを示すマーク等の図形も印字できるようになっている。 As shown in FIG. 4 and FIG. 5A, the base region 6 is formed so as to form a substantially flat surface as a whole by collecting a large number of first recesses 7 having a uniform diameter α. Yes. Further, as shown in FIG. 5B, the character 4 has the groove-shaped second recesses 8 formed in two rows, and the width β of the second recesses 8 is 40 μm, which is substantially the same as the laser spot diameter. Yes. Note that the character 4 can be printed thickly by increasing the number of rows of the second recesses 8. Further, by using the laser irradiation device 5, not only the printing of the character 4 but also a graphic such as a mark indicating the manufacturer of the capacitor 1 can be printed.
図７に示すように、従来の印字方法では、微細な凹凸形状をなす光の反射濃度が不均一な外表面３に、前述した第２凹部８と同様な凹部を形成することで、文字を印字していたため、肉眼で金属ケース２の外表面３を見たときに、文字が不均一な光の反射によって見え難くなっていた。 As shown in FIG. 7, in the conventional printing method, a character is formed by forming a concave portion similar to the second concave portion 8 described above on the outer surface 3 having a non-uniform reflection density of light having a fine concave-convex shape. Since the characters were printed, when the outer surface 3 of the metal case 2 was viewed with the naked eye, the characters were difficult to see due to uneven light reflection.
しかしながら、本実施例の印字方法によれば、金属ケース２の外表面３の少なくとも一部に、レーザ照射によって均一な深さに形成される第１凹部７によって下地領域６を形成するとともに、その下地領域６内に、レーザ照射によって均一な深さに形成され、かつ光の反射濃度が第１凹部７と異なる第２凹部８によって文字４を印字したことで、レーザ照射を用いることで、第１凹部７を均一な深さに精度良く形成できるとともに、さらにレーザ照射にて、第２凹部８を容易に形成できるとともに、図６に示すように、金属ケース２の外表面３において、第２凹部８により印字された文字４の周囲が、第１凹部７によって均一な深さに形成された下地領域６となり、かつ印字された文字４と下地領域６との光の反射濃度が異なるため、金属ケース２の外表面３を肉眼で視認したときに、印字された文字４を明確に視認することができる。 However, according to the printing method of the present embodiment, the ground region 6 is formed on at least a part of the outer surface 3 of the metal case 2 by the first recess 7 formed to have a uniform depth by laser irradiation. The character 4 is printed by the second recess 8 which is formed in the base region 6 by laser irradiation to have a uniform depth and the reflection density of light is different from the first recess 7. The first concave portion 7 can be accurately formed to a uniform depth, and the second concave portion 8 can be easily formed by laser irradiation. Further, as shown in FIG. Since the periphery of the character 4 printed by the concave portion 8 becomes the base region 6 formed at a uniform depth by the first concave portion 7 and the light reflection density of the printed character 4 and the base region 6 is different, Metal The outer surface 3 of the scan 2 when viewed by the naked eye, it is possible to clearly visually recognize the characters 4 is printed.
また、第２凹部８を第１凹部７よりも深くなるように形成することで、第２凹部８が第１凹部７よりも光を吸収し易くなり、第２凹部８によって印字された文字４の明度が、第１凹部７によって形成された下地領域６よりも暗くなり、文字４と下地領域６とのコントラストを明確にできる。 Further, by forming the second recess 8 so as to be deeper than the first recess 7, the second recess 8 can absorb light more easily than the first recess 7, and the character 4 printed by the second recess 8 can be obtained. Is darker than the base region 6 formed by the first recess 7, and the contrast between the character 4 and the base region 6 can be clarified.
また、第１凹部７の直径αが１００μｍ以下となっており、レーザ照射の走査によって下地領域６を形成することで、レーザ照射の走査によって直径αが１００μｍ以下の第１凹部７が、金属ケース２の外表面３に各第１凹部７が重ならず均一に並べられた状態で形成されるため、金属ケース２を肉眼で視認したときに、第１凹部７で形成される下地領域６が均一の反射濃度となり、かつ滑らかな面となって視認されるようになり、第２凹部８によって印字された文字４や図形を明確に視認することができる。 The first recess 7 has a diameter α of 100 μm or less, and the base region 6 is formed by laser irradiation scanning, so that the first recess 7 having a diameter α of 100 μm or less by the laser irradiation scanning becomes a metal case. 2 is formed in a state where the first concave portions 7 are arranged uniformly without overlapping each other, and when the metal case 2 is viewed with the naked eye, the base region 6 formed by the first concave portions 7 is formed. A uniform reflection density and a smooth surface are visually recognized, and the characters 4 and figures printed by the second recess 8 can be clearly visually recognized.
尚、レーザ照射によって金属ケース２の外表面３に下地領域６を形成するため、機械研磨等のレーザ照射以外の方法によって金属ケース２の外表面３に凹部を形成したときと比べて、切粉等の発生が無く、下地領域６の形成後に金属ケース２を洗浄して切粉等を洗い落とす作業を行う必要がなくなる。 In addition, since the base region 6 is formed on the outer surface 3 of the metal case 2 by laser irradiation, the chips are smaller than when the concave portion is formed on the outer surface 3 of the metal case 2 by a method other than laser irradiation such as mechanical polishing. This eliminates the need for cleaning the metal case 2 to remove chips and the like after the base region 6 is formed.
尚、同一のレーザ照射装置５を用いて下地領域６及び文字４の印字が可能になるため、印字の際に用いる装置がレーザ照射装置５のみとなり、金属ケース２に文字４を印字する際のコストを低減できる。 Since the base region 6 and the character 4 can be printed using the same laser irradiation device 5, only the laser irradiation device 5 is used for printing, and the character 4 is printed on the metal case 2. Cost can be reduced.
尚、レーザ照射装置５を用いて下地領域６及び文字４を形成する際に、レーザ照射装置５のレーザ周波数、レーザスポット径を同一に設定しておき、レーザ光線の走査速度、レーザパワーを変化させることで、外表面３に形成される第１凹部７及び第２凹部８の深さや、各凹部の間隔を調節しているので、レーザ照射装置５から発射されるレーザ光線の出力制御がし易くなっている。 When the base region 6 and the characters 4 are formed using the laser irradiation device 5, the laser frequency and laser spot diameter of the laser irradiation device 5 are set to be the same, and the scanning speed and laser power of the laser beam are changed. As a result, the depth of the first recess 7 and the second recess 8 formed on the outer surface 3 and the interval between the recesses are adjusted, so that the output of the laser beam emitted from the laser irradiation device 5 is controlled. It is easy.
以上、本発明の実施例を図面により説明してきたが、具体的な構成はこれら実施例に限られるものではなく、本発明の要旨を逸脱しない範囲における変更や追加があっても本発明に含まれる。 Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to these embodiments, and modifications and additions within the scope of the present invention are included in the present invention. It is.
例えば、前記実施例では、文字４を構成する第２凹部８の深さが、下地領域６を構成する第１凹部７よりも深くなるように形成されていたが、文字４を構成する第２凹部８の深さを、下地領域６を構成する第１凹部７よりも浅くなるように形成することで、印字された文字４と下地領域６との光の反射濃度を異ならせるようにしてもよい。 For example, in the above embodiment, the depth of the second recess 8 constituting the character 4 is formed to be deeper than the first recess 7 constituting the base region 6. By forming the depth of the concave portion 8 so as to be shallower than the first concave portion 7 constituting the base region 6, the light reflection density of the printed character 4 and the base region 6 may be made different. Good.
また、前記実施例では、アルミニウムで形成された金属ケース２に下地領域６を形成することで、レーザ照射による印字がなされた文字４や図形を見やすくしていたが、アルミニウム以外の金属材料を用いた金属ケースに下地領域６を形成するようにしてもよく、プレス加工やインパクト成形加工により形成された金属ケース２の表面は、微細な凹凸形状をなしており、その状態のまま文字や図形を印字すると見え難くなるが、下地領域６を形成することで、印字された文字や図形が見やすくなる。 Moreover, in the said Example, although the base area | region 6 was formed in the metal case 2 formed with aluminum, it was easy to see the character 4 and figure which were printed by laser irradiation, However, Metal materials other than aluminum are used. The base region 6 may be formed on the metal case, and the surface of the metal case 2 formed by pressing or impact molding has a fine concavo-convex shape. Although it becomes difficult to see when printed, by forming the base region 6, printed characters and figures are easy to see.
また、前記実施例では、金属ケース２の外表面３の一部（側面領域）に下地領域６を形成されていたが、金属ケースの底面領域に施し、この領域に印字を行ってもよい。また、下地領域６を金属ケース２全体に施すようにしてもよい。また、金属ケース２の全体に下地領域６を形成することで、下地領域６を形成する第１凹部７は微小な凹部であるため、この文字４が印字された部位以外の下地領域６に接着剤を塗布してコンデンサ１と基板など強固に接着させることもできる。 Moreover, in the said Example, although the base | substrate area | region 6 was formed in a part (side surface area | region) of the outer surface 3 of the metal case 2, it may give to the bottom face area | region of a metal case, and may print on this area | region. Further, the base region 6 may be applied to the entire metal case 2. Further, by forming the base region 6 on the entire metal case 2, the first concave portion 7 forming the base region 6 is a minute concave portion, so that it adheres to the base region 6 other than the portion where the character 4 is printed. An agent may be applied to firmly adhere the capacitor 1 and the substrate.
１ コンデンサ（電子部品）
２ 金属ケース
３ 外表面
４ 文字
５ レーザ照射装置
６ 下地領域
７ 第１凹部
８ 第２凹部
1 Capacitor (electronic component)
2 Metal case 3 Outer surface 4 Character 5 Laser irradiation device 6 Base region 7 First recess 8 Second recess
Claims (3)
前記外表面の少なくとも一部に、レーザ照射によって均一な深さ及び均一な間隔に形成される複数の第１凹部によって下地領域を形成するとともに、該下地領域内に、レーザ照射によって形成され、かつ光の反射濃度が前記第１凹部と異なる第２凹部によって文字や図形を印字したことを特徴とする電子部品の金属ケース。 A metal case of an electronic component that is formed of a metal material, has a fine uneven shape with an uneven outer surface, and is used as an exterior of an electronic component,
A ground region is formed on at least a part of the outer surface by a plurality of first recesses formed at a uniform depth and a uniform interval by laser irradiation, and is formed by laser irradiation in the ground region; and A metal case for an electronic component, wherein characters and figures are printed by a second recess having a light reflection density different from that of the first recess.
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| JP4692853B2 (en) * | 2008-04-25 | 2011-06-01 | 本田技研工業株式会社 | Power storage device and metal battery case manufacturing method |
| JP5123925B2 (en) * | 2009-12-14 | 2013-01-23 | 日東電工株式会社 | Marking method, mark recognition method, and printed circuit board |
| KR101927070B1 (en) * | 2010-04-27 | 2018-12-11 | 삼성전자주식회사 | Fabrication method for case of portable electoric device |
| JP5849203B2 (en) * | 2010-12-24 | 2016-01-27 | パナソニックＩｐマネジメント株式会社 | Electrolytic capacitor manufacturing method |
| US9644283B2 (en) * | 2011-09-30 | 2017-05-09 | Apple Inc. | Laser texturizing and anodization surface treatment |
| CN104884205A (en) * | 2012-12-20 | 2015-09-02 | 伊雷克托科学工业股份有限公司 | Methods of forming images by laser micromachining |
| EP2887444B1 (en) * | 2013-12-19 | 2016-11-16 | The Swatch Group Research and Development Ltd. | Cell with structured surface |
| EP2887418A1 (en) * | 2013-12-19 | 2015-06-24 | The Swatch Group Research and Development Ltd. | Cell with non-conducting structured surface |
| JP6843686B2 (en) | 2017-04-14 | 2021-03-17 | 株式会社三井ハイテック | Manufacturing method of metal products and metal products |
| JP6592476B2 (en) * | 2017-05-11 | 2019-10-16 | 日本特殊陶業株式会社 | Spark plug and method of manufacturing spark plug |
| JP7234481B2 (en) * | 2017-07-18 | 2023-03-08 | 住友電工焼結合金株式会社 | Sintered products and their laser marking methods |
| JP2019136730A (en) * | 2018-02-08 | 2019-08-22 | ボーンズ株式会社 | Resin molding and marking method |
| JP7078453B2 (en) * | 2018-05-11 | 2022-05-31 | 株式会社三井ハイテック | Manufacturing method of metal products and metal products |
| WO2023139813A1 (en) * | 2022-01-19 | 2023-07-27 | ヌヴォトンテクノロジージャパン株式会社 | Semiconductor device and laser marking method |
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