JP7243888B1 - セラミックス基板、セラミックス分割基板、及びセラミックス基板の製造方法 - Google Patents
セラミックス基板、セラミックス分割基板、及びセラミックス基板の製造方法 Download PDFInfo
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- 239000000758 substrate Substances 0.000 title claims abstract description 89
- 239000000919 ceramic Substances 0.000 title claims abstract description 80
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- 239000000463 material Substances 0.000 claims abstract description 273
- 238000005219 brazing Methods 0.000 claims abstract description 246
- 229910052751 metal Inorganic materials 0.000 claims abstract description 128
- 239000002184 metal Substances 0.000 claims abstract description 128
- 238000007650 screen-printing Methods 0.000 claims abstract description 38
- 239000000945 filler Substances 0.000 claims description 21
- 238000005259 measurement Methods 0.000 description 21
- 238000005530 etching Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 4
- 239000011230 binding agent Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052581 Si3N4 Inorganic materials 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000005121 nitriding Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical group N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 2
- 239000011863 silicon-based powder Substances 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000011282 treatment Methods 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000007606 doctor blade method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
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Abstract
Description
図1は、本発明の実施の形態に係るセラミックス基板の構成例を示し、(a)は表(おもて)面を示す平面図、(b)は側面図、(c)は裏面を示す平面図である。このセラミックス基板1は、平板状のセラミックスからなる絶縁基材2と、絶縁基材2の第1の主面2aに設けられた第1のろう材層31と、絶縁基材2の第2の主面2bに設けられた第2のろう材層32と、第1のろう材層31を介して絶縁基材2の第1の主面2a側に固定された金属からなる第1の金属層41と、第2のろう材層32を介して絶縁基材2の第2の主面2b側に固定された金属からなる第2の金属層42とを備えている。
次に、セラミックス基板1のより具体的な実施例について説明する。図6は、金属層形成工程におけるエッチングを行う前の状態のセラミックス基板10を示し、(a)は表面を示す平面図、(b)は側面図、(c)は裏面を示す平面図である。このセラミックス基板10は、絶縁基材2の第1の主面2a側に第1のろう材層31によって第1の金属板401がろう付けされ、絶縁基材2の第2の主面2b側に第2のろう材層32によって第2の金属板402がろう付けされている。
以上説明した実施の形態によれば、第1のろう材層31の厚さと第2のろう材層32の厚さとの差を4.0μm以下とすることにより、セラミックス基板1の反りを抑制することが可能となる。また、第1のろう材層形成工程におけるスクリーン印刷の回数値と、第2のろう材層形成工程におけるスクリーン印刷の回数値とを一致させることにより、工程を追加することなく、各測定箇所における第1のろう材層31の厚さと第2のろう材層32の厚さとの差を小さくすることができる。これにより、本実施の形態によれば、コストを抑制しながらも、反りを抑制することが可能となる。
次に、以上説明した実施の形態から把握される技術思想について、実施の形態における符号等を援用して記載する。ただし、以下の記載における各符号は、特許請求の範囲における構成要素を実施の形態に具体的に示した部材等に限定するものではない。
(51~53)が搭載される回路板であり、他方が熱を放熱する放熱板であり、前記第1の金属層(41)の厚さと前記第2の金属層(42)の厚さとの差が0.02mm以下である、上記[1]又は[2]に記載のセラミックス基板(1)。
2a…第1の主面 2b…第2の主面
30…ろう材 31…第1のろう材層
32…第2のろう材層 401…第1の金属板
402…第2の金属板 41…第1の金属層
42…第2の金属層 621…第1のスキージ
622…第2のスキージ 7…スクリーン
Claims (6)
- 平板状のセラミックスからなる絶縁基材と、前記絶縁基材の第1の主面に設けられた第1のろう材層と、前記絶縁基材の第2の主面に設けられた第2のろう材層と、前記第1のろう材層を介して前記絶縁基材の前記第1の主面側に固定された金属からなる第1の金属層と、前記第2のろう材層を介して前記絶縁基材の前記第2の主面側に固定された金属からなる第2の金属層とを備え、
任意の箇所における前記第1のろう材層の厚さと、前記任意の箇所の裏側にあたる箇所の前記第2のろう材層の厚さとの差が、4.0μm以下である、
セラミックス基板。 - 任意の箇所における前記第1のろう材層の厚さ及び前記第2のろう材層の厚さのうち、厚い方をTaとし、薄い方をTbとしたとき、(Ta-Tb)/Ta≦0.2の関係式を満たす、
請求項1に記載のセラミックス基板。 - 前記第1の金属層及び前記第2の金属層は、一方が電気回路部品が搭載される回路板であり、他方が放熱板であり、
前記第1の金属層の厚さと前記第2の金属層の厚さとの差が0.02mm以下である、
請求項1又は2に記載のセラミックス基板。 - 前記絶縁基材が矩形状であり、前記絶縁基材の各辺に沿った方向の100mmあたりの前記絶縁基材の反り量が0.03mm以下である、
請求項1乃至3の何れか1項に記載のセラミックス基板。 - 請求項1乃至4の何れか1項に記載のセラミックス基板を複数に分割して形成された、セラミックス分割基板。
- 請求項1乃至4の何れか1項に記載のセラミックス基板を複数個連続して製造する、セラミックス基板の製造方法であって、
前記複数個の前記絶縁基材の前記第1の主面にろう材を塗布して前記第1のろう材層を形成する第1のろう材層形成工程と、
前記複数個の前記絶縁基材の前記第2の主面にろう材を塗布して前記第2のろう材層を形成する第2のろう材層形成工程と、
前記第1のろう材層及び前記第2のろう材層にそれぞれ金属板を重ねてろう付けし、前記第1の金属層及び前記第2の金属層を形成する金属層形成工程と、を備え、
前記第1のろう材層形成工程及び前記第2のろう材層形成工程では、スクリーン上に前記ろう材を複数回にわたって補給しながら前記ろう材をスキージによって前記絶縁基材側に押し出すスクリーン印刷によって前記ろう材を塗布し、前記ろう材を補給した後、次に前記ろう材を補給するまでの間に、複数の前記絶縁基材に対して前記ろう材を塗布し、前記絶縁基材のぞれぞれについて、前記第1のろう材層形成工程において前記ろう材を補給した後の何回目のスクリーン印刷であるかを示す回数値と、前記第2のろう材層形成工程において前記ろう材を補給した後の何回目のスクリーン印刷であるかを示す回数値とを一致させる、
セラミックス基板の製造方法。
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