DE102013104055A1 - A base substrate, a metal-ceramic substrate made of a base substrate and a method for producing a base substrate - Google Patents
A base substrate, a metal-ceramic substrate made of a base substrate and a method for producing a base substrate Download PDFInfo
- Publication number
- DE102013104055A1 DE102013104055A1 DE102013104055.1A DE102013104055A DE102013104055A1 DE 102013104055 A1 DE102013104055 A1 DE 102013104055A1 DE 102013104055 A DE102013104055 A DE 102013104055A DE 102013104055 A1 DE102013104055 A1 DE 102013104055A1
- Authority
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- Germany
- Prior art keywords
- predetermined breaking
- base substrate
- depth
- ceramic layer
- breaking lines
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000758 substrate Substances 0.000 title claims abstract description 142
- 239000000919 ceramic Substances 0.000 title claims abstract description 111
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 21
- 238000001465 metallisation Methods 0.000 claims abstract description 34
- 238000000034 method Methods 0.000 claims description 28
- 239000000463 material Substances 0.000 claims description 11
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 7
- 229910052760 oxygen Inorganic materials 0.000 claims description 7
- 239000001301 oxygen Substances 0.000 claims description 7
- 239000000835 fiber Substances 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims 2
- 238000009933 burial Methods 0.000 claims 1
- 239000007787 solid Substances 0.000 claims 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 17
- 229910052751 metal Inorganic materials 0.000 description 16
- 239000002184 metal Substances 0.000 description 16
- 229910052802 copper Inorganic materials 0.000 description 12
- 239000010949 copper Substances 0.000 description 12
- 239000000853 adhesive Substances 0.000 description 11
- 230000001070 adhesive effect Effects 0.000 description 11
- 229910052782 aluminium Inorganic materials 0.000 description 6
- 239000011889 copper foil Substances 0.000 description 6
- 238000000926 separation method Methods 0.000 description 6
- 230000008018 melting Effects 0.000 description 5
- 238000002844 melting Methods 0.000 description 5
- 229910000881 Cu alloy Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
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- 230000009467 reduction Effects 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 2
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 2
- 239000005751 Copper oxide Substances 0.000 description 2
- 239000004917 carbon fiber Substances 0.000 description 2
- 239000002134 carbon nanofiber Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
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- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000005304 joining Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical class C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- BUHVIAUBTBOHAG-FOYDDCNASA-N (2r,3r,4s,5r)-2-[6-[[2-(3,5-dimethoxyphenyl)-2-(2-methylphenyl)ethyl]amino]purin-9-yl]-5-(hydroxymethyl)oxolane-3,4-diol Chemical compound COC1=CC(OC)=CC(C(CNC=2C=3N=CN(C=3N=CN=2)[C@H]2[C@@H]([C@H](O)[C@@H](CO)O2)O)C=2C(=CC=CC=2)C)=C1 BUHVIAUBTBOHAG-FOYDDCNASA-N 0.000 description 1
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- PIGFYZPCRLYGLF-UHFFFAOYSA-N Aluminum nitride Chemical compound [Al]#N PIGFYZPCRLYGLF-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052684 Cerium Inorganic materials 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 239000002041 carbon nanotube Substances 0.000 description 1
- 229910021393 carbon nanotube Inorganic materials 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 229910052735 hafnium Inorganic materials 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 238000012549 training Methods 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
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Abstract
Die Erfindung betrifft ein Basissubstrat, ein Metall-Keramik-Substrat hergestellt aus einem derartigen Basissubstrat sowie ein Verfahren zur Herstellung eines Basissubstrates umfassend zumindest eine Keramikschicht (2), die an zumindest einer Oberflächenseite (3a, 2b) mit mindestens einer Metallisierung (3) versehen ist, bei dem die Metallisierung (3) zur Erzeugung vorzugsweise mehrerer einzelner Metall-Keramik-Substrate (2) aus dem Basissubstrat (1) strukturiert ist, und bei dem zum Abtrennen von ungenützten Randbereichen (1a–1d) des Basissubstrates (1) und/oder zum Vereinzeln des Basissubstrates (1) in mehrere einzelne Metall-Keramik-Substrate (2) mittels einer Laservorrichtung in zumindest einer Oberflächenseite (3.1, 3.2) der Keramikschicht (3) des Basissubstrates (1) mehrere Sollbruchlinien (6a–6f) eingebracht werden, wobei sich jeweils zwei der Sollbruchlinien (6a–6f) in jeweils einem Kreuzungsbereich (K1–K9) schneiden. Besonders vorteilhaft weisen die Sollbruchlinien (6a–6f) zumindest in den Kreuzungsbereichen (K1–K9) eine erste Tiefe (T1) und außerhalb der Kreuzungsbereiche (K1–K9) eine zweite Tiefe (T2) auf, wobei die erste Tiefe (T1) größer als die zweite Tiefe (T2) ist.The invention relates to a base substrate, a metal-ceramic substrate produced from such a base substrate and a method for producing a base substrate comprising at least one ceramic layer (2) which is provided with at least one metallization (3) on at least one surface side (3a, 2b) in which the metallization (3) is structured to produce preferably a plurality of individual metal-ceramic substrates (2) from the base substrate (1), and in which to separate unused edge regions (1a-1d) of the base substrate (1) and / or to separate the base substrate (1) into several individual metal-ceramic substrates (2) by means of a laser device in at least one surface side (3.1, 3.2) of the ceramic layer (3) of the base substrate (1), several predetermined breaking lines (6a-6f) , whereby two of the predetermined breaking lines (6a-6f) each intersect in an intersection area (K1-K9). Particularly advantageously, the predetermined breaking lines (6a-6f) have a first depth (T1) at least in the intersection areas (K1-K9) and a second depth (T2) outside the intersection areas (K1-K9), the first depth (T1) being greater than the second depth (T2).
Description
Die Erfindung betrifft ein Basissubstrat gemäß dem Oberbegriff des Patentanspruches 1, ein Metall-Keramik-Substrat hergestellt aus einem Basissubstrat gemäß dem Oberbegriff des Patentanspruches 7 sowie ein Verfahren zum Herstellen eines Basissubstrates gemäß dem Oberbegriff des Patentanspruches 8. The invention relates to a base substrate according to the preamble of
Substrate, insbesondere Basissubstrate in Form von Leiterplatten bestehend aus einer Keramikschicht und wenigstens einer mit einer Oberflächenseite der Keramikschicht verbundenen und zur Ausbildung von Leiterbahnen, Kontakten, Kontakt- oder Anschlussflächen strukturierbaren Metallisierung sind in verschiedensten Ausführungen bekannt. Durch entsprechende Strukturierung der Metallisierung können insbesondere mehrere Metall-Keramik-Substrate auf dem Basissubstrat erzeugt werden und diese dann im Laufe des Herstellungsverfahrens vereinzelt werden. Die dadurch erhaltenen Metall-Keramik-Substrate finden beispielsweise Verwendung zum Aufbau von Leistungshalbleitermodulen. Substrates, in particular base substrates in the form of printed circuit boards consisting of a ceramic layer and at least one metallization connected to a surface side of the ceramic layer and structurable to form printed conductors, contacts, contact surfaces or connecting surfaces, are known in various designs. By appropriate structuring of the metallization, in particular a plurality of metal-ceramic substrates can be produced on the base substrate and these are then separated in the course of the production process. The resulting metal-ceramic substrates are used, for example, for the construction of power semiconductor modules.
Zum Verbinden von die Metallisierung bildenden Metallfolien oder Metallschichten miteinander oder mit einem Keramiksubstrat bzw. einer Keramikschicht ist ferner das sogenannte „DCB-Verfahren“ („Direct-Copper-Bonding“) bekannt. Dabei werden Metallschichten, vorzugsweise Kupferschichten oder -folien miteinander und/oder mit einer Keramikschicht verbunden, und zwar unter Verwendung von Metall- bzw. Kupferblechen oder Metall- bzw. Kupferfolien, die an ihren Oberflächenseiten eine Schicht oder einen Überzug („Aufschmelzschicht“) aus einer chemischen Verbindung aus dem Metall und einem reaktiven Gas, bevorzugt Sauerstoff aufweisen. Bei diesem beispielsweise in der
- – Oxidieren einer Kupferfolie derart, dass sich eine gleichmäßige Kupferoxidschicht ergibt;
- – Auflegen des Kupferfolie mit der gleichmäßige Kupferoxidschicht auf die Keramikschicht;
- – Erhitzen des Verbundes auf eine Prozesstemperatur zwischen etwa 1025 bis 1083°C, beispielsweise auf ca. 1071°C;
- – Abkühlen auf Raumtemperatur.
- - Oxidizing a copper foil such that a uniform copper oxide layer results;
- - placing the copper foil with the uniform copper oxide layer on the ceramic layer;
- - Heating the composite to a process temperature between about 1025 to 1083 ° C, for example, to about 1071 ° C;
- - Cool to room temperature.
Ferner ist aus den Druckschriften
Auch sind Verfahren zur flächigen Verbindung einer Aluminiumschicht mit einer Keramikschicht unter der Bezeichnung „Direct-Aluminium-Bonding“ („DAB-Verfahren“) bekannt. Grundsätzlich können auch Klebeverbindungen oder Klebe-Techniken unter Verwendung von Kunststoff-Klebern, beispielsweise unter Verwendung von Klebern auf Epoxyharz-Basis für ein derartiges Bonden zweier Schichten verwendet werden, und zwar insbesondere auch faserverstärkte Kleber. Bekannt ist insbesondere auch die Verwendung von speziellen Klebern, die Carbon-Fasern und/oder Carbon-Nanofasern und/oder Carbon-Nanotubes enthalten, und/oder Kleber, mit denen eine thermische und/oder elektrisch gut leitende Klebeverbindung möglich ist. Genannte Verbindungstechnologien können bei Vorsehen mehrere Metallschichten sowohl an der Unter- als auch der Oberseite der Keramikschicht selbstverständlich auch in Kombination Anwendung finden. Also known are methods for bonding an aluminum layer to a ceramic layer under the name "Direct Aluminum Bonding" ("DAB method"). In principle, adhesive bonds or adhesive techniques using plastic adhesives, for example using epoxy resin-based adhesives, can also be used for such a bonding of two layers, in particular also fiber-reinforced adhesives. Also known in particular is the use of special adhesives containing carbon fibers and / or carbon nanofibers and / or carbon nanotubes, and / or adhesives, with which a thermal and / or good electrical conductive adhesive bond is possible. Said connection technologies can, of course, also be used in combination when providing a plurality of metal layers on both the lower and the upper side of the ceramic layer.
Zur Herstellung der Metall-Keramik-Substrate wird zumindest eine der Metallisierung des Basissubstrates entsprechend strukturiert und zumindest entlang der freien Randabschnitte des Basissubstrates in die von Metall befreite Keramikoberfläche Sollbruchstellen bzw. Sollbruchlinien eingebracht, entlang denen vorzugsweise manuell zumindest die ungenützten Randabschnitte des Basissubstrates entfernt werden. Auch bei einer Herstellung von mehreren einzelnen Metall-Keramik-Substraten aus dem Basissubstrat im Mehrfachnutzen werden die auf dem Basissubstrat, beispielsweise einer Großsubstratplatte erzeugten Metall-Keramik-Substrate durch eine Vielzahl von parallel und senkrecht zueinander verlaufenden Sollbruchlinien in mehrere vorzugsweise rechteckförmige oder quadratische Einzelsubstrate aufgeteilt und durch entsprechendes Brechen des Basissubstrates entlang der in die Keramikschicht eingebrachten Sollbruchlinien vereinzelt. For the production of the metal-ceramic substrates, at least one of the metallization of the base substrate is patterned and at least along the free edge portions of the base substrate in the metal-free ceramic surface predetermined breaking points or predetermined breaking lines along which preferably manually at least the unused edge portions of the base substrate are removed. Even when producing a plurality of individual metal-ceramic substrates from the base substrate in multiple use, the metal-ceramic substrates produced on the base substrate, for example a bulk substrate plate, are divided into a plurality of preferably rectangular or square individual substrates by a plurality of parallel and perpendicularly extending predetermined breaking lines and by appropriate breaking of the Separated base substrate along the introduced into the ceramic layer fracture lines.
Zur Erzeugung derartiger Sollbruchlinien sind diverse Verfahren bekannt. Häufig finden hierzu Laservorrichtungen Verwendung, über die zur Erzeugung einer Sollbruchlinie mehrere Ausnehmungen derselben Tiefe in die Keramikoberfläche eingebracht werden, und zwar durch Beaufschlagen mit einem entsprechend modulierten oder gepulsten Laserstrahl. Die Ausnehmungen können beispielsweise beabstandet zueinander entlang einer Linie angeordnet sein oder einander überlappen. Various methods are known for producing such predetermined breaking lines. Frequently, laser devices are used for this purpose, via which a plurality of recesses of the same depth are introduced into the ceramic surface in order to produce a predetermined breaking line, namely by applying a correspondingly modulated or pulsed laser beam. For example, the recesses may be spaced apart along a line or overlapping one another.
Aus der
Nachteilig treten jedoch bei Keramik-Substraten mit derartigen Sollbruchlinien, beim manuellen Entfernen der Randabschnitte bzw. Vereinzeln der einzelnen Substrate insbesondere in den Kreuzungsbereichen der Sollbruchlinien Brüche, ggf. auch Schollenbrüche in der Keramikschicht auf, welche zu einer erheblichen Beschädigung und damit Unbrauchbarkeit des vereinzelten Substrates führen. Eine Reduzierung der hierdurch bedingten Ausschussrate bei bekannten Herstellungsverfahren ist daher von besonderer wirtschaftlicher Bedeutung. Disadvantages, however, occur in the case of ceramic substrates with such predetermined breaking lines, during manual removal of the edge sections or singulation of the individual substrates, especially in the crossing regions of the predetermined breaking lines, possibly also floe fractures in the ceramic layer, which leads to considerable damage and thus unusability of the separated substrate to lead. A reduction of the consequent reject rate in known manufacturing processes is therefore of particular economic importance.
Ausgehend von dem voranstehend genannten Stand der Technik liegt der Erfindung die Aufgabe zugrunde, ein Basissubstrat, ein daraus hergestelltes Metall-Keramik-Substrat sowie ein zu dessen Herstellung geeignetes Verfahren aufzuzeigen, welches ein zuverlässiges manuelles Entfernen der ungenützten Randabschnitte des Basissubstrates und ein zuverlässiges Vereinzeln des Basissubstrates in einzelne Metall-Keramik-Substrate ohne Beschädigung des jeweiligen Metall-Keramik-Substrate ermöglicht, wodurch die eine deutliche Reduzierung der Ausschussrate erreicht wird. Die Aufgabe wird durch ein Basissubstrat gemäß dem Patentanspruch 1, ein Metall-Keramik-Substrat gemäß dem Patentanspruch 7 und ein Verfahren zum Herstellen eines Basissubstrates gemäß Patentanspruch 8 gelöst. Based on the above-mentioned prior art, the present invention seeks to provide a base substrate, a metal-ceramic substrate produced therefrom and a suitable method for its production, which provides a reliable manual removal of unused edge portions of the base substrate and a reliable separation of the Base substrates in individual metal-ceramic substrates without damaging the respective metal-ceramic substrates allows, whereby the significant reduction in the rejection rate is achieved. The object is achieved by a base substrate according to
Der wesentliche Aspekt des erfindungsgemäßen Basissubstrates ist darin zu sehen, dass die Sollbruchlinien zumindest in den Kreuzungsbereichen eine erste Tiefe und außerhalb der Kreuzungsbereiche eine zweite Tiefe aufweisen, wobei die erste Tiefe größer als die zweite Tiefe ist. Besonders vorteilhaft wird damit in den Eckbereichen der zu vereinzelnden Metall-Keramik-Substraten eine geringere Bruchkraft erforderlich, wodurch insbesondere das Entstehen von wilden Brüchen, insbesondere auch Schollenbrüchen effektiv verhindert und damit die Ausschussrate des Vereinzelungsprozesses erheblich reduziert werden kann. Weiterhin vorteilhaft wird die im Basissubstrat vorhandene Spannung insbesondere in den Kreuzungsbereichen reduziert und das Entstehen von Mikrorissen minimiert. Das vereinzelte Metall-Keramik-Substrat weist darüber hinaus eine hochqualitative Kantenlinie auf. The essential aspect of the base substrate according to the invention can be seen in that the predetermined breaking lines have a first depth at least in the crossing regions and a second depth outside the crossing regions, wherein the first depth is greater than the second depth. Particularly advantageous is thus in the corner regions of the metal-ceramic substrates to be separated a lower breaking strength required, which in particular effectively prevents the formation of wild fractures, especially floe fractures and thus the reject rate of the separation process can be significantly reduced. Further advantageously, the voltage present in the base substrate is reduced, in particular in the crossing regions, and the formation of microcracks is minimized. The isolated metal-ceramic substrate also has a high quality edge line.
In einer vorteilhaften Weiterbildung der Erfindung sind die Sollbruchlinien in einer ersten Oberflächenseite der Keramikschicht und/oder in der gegenüberliegenden zweiten Oberflächenseite der Keramikschicht eingebracht. Die Sollbruchlinien können beispielsweise auch an der der strukturierten Metallisierung gegenüberliegenden Oberflächenseite der Keramikschicht vorgesehen sein, so dass das Basissubstrat bereits mit elektronischen Bauteilen vor der Vereinzelung in die einzelnen Metall-Keramik-Substrate bestückt werden kann. In an advantageous development of the invention, the predetermined breaking lines are introduced in a first surface side of the ceramic layer and / or in the opposite second surface side of the ceramic layer. The predetermined breaking lines can also be provided, for example, on the surface side of the ceramic layer opposite the structured metallization, so that the base substrate can already be equipped with electronic components prior to singulation into the individual metal-ceramic substrates.
Weiterhin vorteilhaft können die Sollbruchlinien in Form einer kontinuierlichen Vertiefung oder in Form einer diskontinuierlichen Vertiefung ausgebildet sein, wobei die kontinuierlichen Vertiefungen vorzugsweise schlitzartig ausgebildet sind und die diskontinuierlichen Vertiefungen von einer linienartigen Anordnung einer Vielzahl von Einschusskratern in einer Oberflächenseite gebildet sind, die beispielsweise beabstandet zueinander und/oder überlappend angeordnet sind. Bei der Ausbildung in Form von kontinuierlichen schlitzartigen Vertiefungen bzw. so genannte „Grooves“ wird eine Reduzierung der Breite der Vertiefungen auf bis zu ein Drittel im Vergleich zu den Einschusskratern und damit auch ein geringer Materialabtrag erreicht. Vorteilhaft ergibt sich darüber hinaus auch eine verbesserte Kerbwirkung und die Risseinleitung ist deutlich besser kontrollierbar. Darüber hinaus entstehen bei der Vereinzelung der Metall-Keramik-Substrate im Vergleich zu durch Einschusskrater gebildete Sollbruchlinien deutlich weniger Bruchstaub und wenige Splitter. Further advantageously, the predetermined breaking lines can be in the form of a continuous depression or in the form of a discontinuous depression, wherein the continuous depressions are preferably slit-like and the discontinuous depressions are formed by a line-like arrangement of a plurality of shot craters in a surface side which are spaced apart, for example / or are arranged overlapping. In the training in the form of continuous slot-like depressions or so-called "grooves" a reduction in the width of the wells is achieved in up to one third compared to the Einschusskratern and thus a low material removal. In addition, an improved notch effect advantageously results, and the initiation of the crack is significantly easier to control. Moreover, in the separation of the metal-ceramic substrates compared to predetermined breaking lines formed by break-in craters significantly less fracture dust and a few splinters.
Gemäß einer weiteren vorteilhaften Ausgestaltung der Erfindung ist die in den Kreuzungsbereichen vorgesehene vergrößerte erste Tiefe der Sollbruchstellen durch ein mehrfaches Beaufschlagen der Kreuzungsbereiche mit einem durch die Lasereinrichtung erzeugten Laserstrahl mit homogener Leistung oder durch ein einmaliges Beaufschlagen der Kreuzungsbereiche mit einem durch die Lasereinrichtung erzeugten Laserstrahl mit regelbarer Leistung erzeugt. Abhängig von der jeweils verwendeten Laservorrichtung können in einem einfachen oder mehrfach durchzuführenden Prozessschritt die unterschiedlich tiefen Sollbruchstellen schnell und einfach erzeugt werden. According to a further advantageous embodiment of the invention, provided in the crossing areas enlarged first depth of the predetermined breaking points by a multiple Applying the intersection regions generated with a laser beam generated by the laser device with homogeneous power or by a single impingement of the intersection regions with a laser beam generated by the laser device with controllable power. Depending on the laser device used in each case, the different depths of predetermined breaking points can be generated quickly and easily in a single or multiple step to be performed.
Vorteilhaft weisen die Sollbruchstellen in den Kreuzungsbereichen eine im Vergleich zur zweiten Tiefe um 20% bis 80% größere erste Tiefe auf, wobei die zweite Tiefe vorzugsweise zwischen 30 µm und 200 µm beträgt und/oder die erste Tiefe kleiner als 80% der Materialstärke der Keramikschicht ist. Die erste Tiefe der Sollbruchstellen erstreckt sich in den Kreuzungsbereichen vorzugsweise über eine Länge von 0,2 mm bis 20 mm. Advantageously, the predetermined breaking points in the crossing regions have a first depth which is 20% to 80% greater than the second depth, the second depth preferably being between 30 μm and 200 μm and / or the first depth being less than 80% of the material thickness of the ceramic layer is. The first depth of the predetermined breaking points preferably extends in the crossing regions over a length of 0.2 mm to 20 mm.
Gegenstand der Erfindung ist ebenfalls ein Metall-Keramik-Substrat hergestellt aus einen von zumindest vier der Sollbruchlinien abgegrenzten Teilbereich der Keramikschicht des Basissubstrates mit zumindest einem an der Oberflächenseite der Keramikschicht vorgesehen strukturierten Metallisierungsabschnitt. The invention likewise provides a metal-ceramic substrate produced from a subregion of the ceramic layer of the base substrate delimited by at least four of the predetermined breaking lines with at least one structured metallization section provided on the surface side of the ceramic layer.
Ferner ist Gegenstand der vorliegenden Erfindung ein Verfahren zum Herstellen eines Basissubstrates umfassend zumindest eine Keramikschicht, die an zumindest einer Oberflächenseite mit mindestens einer Metallisierung versehen ist, bei dem die Metallisierung zur Herstellung von mehreren einzelnen Metall-Keramik-Substraten aus dem Basissubstrat strukturiert wird, und bei dem zum Abtrennen von ungenützten Randbereichen des Basissubstrates und/oder zum Vereinzeln des plattenartigen Basissubstrates in die einzelnen Metall-Keramik-Substrate mittels einer Laservorrichtung in zumindest einer Oberflächenseite der Keramikschicht des Basissubstrates mehrere Sollbruchlinien eingebracht werden, wobei sich jeweils zwei der Sollbruchlinien in jeweils einem Kreuzungsbereich schneiden. Besonders vorteilhaft werden die Sollbruchlinien derart mittels der Laservorrichtung in die Keramikschicht eingebracht, dass diese zumindest in vorgegebenen Kreuzungsbereichen eine erste Tiefe und außerhalb der Kreuzungsbereiche eine zweite Tiefe aufweisen, wobei die erste Tiefe größer als die zweite Tiefe ist. Das erfindungsgemäße Verfahren ist schnell und einfach umsetzbar und reduziert den beim Vereinzeln der Metall-Keramik-Substrate entstehenden Ausschuss erheblich. Furthermore, the subject of the present invention is a method for producing a base substrate comprising at least one ceramic layer, which is provided on at least one surface side with at least one metallization, in which the metallization for producing a plurality of individual metal-ceramic substrates from the base substrate is structured, and in which for separating unused edge regions of the base substrate and / or for separating the plate-like base substrate into the individual metal-ceramic substrates by means of a laser device in at least one surface side of the ceramic layer of the base substrate a plurality of predetermined breaking lines are introduced, each two of the predetermined breaking lines in each case one Cut intersection area. Particularly advantageously, the predetermined breaking lines are introduced into the ceramic layer by means of the laser device in such a way that they have a first depth at at least predetermined intersection areas and a second depth outside the intersection areas, wherein the first depth is greater than the second depth. The method according to the invention can be implemented quickly and easily and considerably reduces the reject produced during the separation of the metal-ceramic substrates.
Gemäß einer Weiterbildung des erfindungsgemäßen Verfahrens wird vor dem Einbringen der Sollbruchlinien zumindest eine der Metallisierungen strukturiert und anschließend werden die Sollbruchlinien in die erste Oberflächenseite der Keramikschicht und/oder die gegenüberliegende zweite Oberflächenseite der Keramikschicht eingebracht. According to a development of the method according to the invention, at least one of the metallizations is patterned before introducing the predetermined breaking lines, and then the predetermined breaking lines are introduced into the first surface side of the ceramic layer and / or the opposite second surface side of the ceramic layer.
Vorteilhaft können die Sollbruchlinien in Form einer kontinuierlichen oder diskontinuierlichen Sollbruchlinien in die Keramikschicht eingebracht werden, wobei die kontinuierlichen Sollbruchlinien in Form von schlitzartigen Vertiefungen ausgebildet sind und die diskontinuierlichen Sollbruchlinien von einer linienartigen Anordnung einer Vielzahl von Einschusskratern in der Oberflächenseite der Keramikschicht gebildet ist. Hierzu wird die in den Kreuzungsbereichen vorgesehene vergrößerte erste Tiefe der Sollbruchstellen entweder durch ein mehrfaches Beaufschlagen der Kreuzungsbereiche mit einem durch die Lasereinrichtung erzeugten Laserstrahl mit homogener Leistung oder durch ein einmaliges Beaufschlagen der Kreuzungsbereiche mit einem durch die Lasereinrichtung erzeugten Laserstrahl mit regelbarer Leistung erzeugt. Die Lasereinrichtung mit regelbarer Laserleistung kann beispielsweise ein Diodenlaser, Faserlaser oder Festkörperlaser mit unterschiedlichen Pulsdauern, beispielsweise Ultrakurzpuls- oder Kurzpulssekundenlaser sein. Alternativ kann zur Erzeugung der diskontinuierlichen Sollbruchlinien eine CO2-Lasereinrichtung Anwendung finden. Advantageously, the predetermined breaking lines can be introduced in the form of a continuous or discontinuous predetermined breaking lines in the ceramic layer, wherein the continuous predetermined breaking lines are formed in the form of slot-like depressions and the discontinuous predetermined breaking lines is formed by a linear arrangement of a plurality of Einschusskratern in the surface side of the ceramic layer. For this purpose, the increased first depth of the predetermined breaking points provided in the crossing regions is generated either by applying the intersection regions repeatedly with a laser beam generated by the laser device with homogeneous power or by applying the intersection regions once with a laser beam with controllable power generated by the laser device. The laser device with adjustable laser power can be, for example, a diode laser, fiber laser or solid-state laser with different pulse durations, for example ultrashort pulse or short pulse-second laser. Alternatively, a CO2 laser device can be used to generate the discontinuous fracture lines.
Bevorzugt erfolgt das Einbringen der Sollbruchstellen mittel der Laservorrichtung in einer sauerstoffhaltigen Atmosphäre, die vorzugsweise einen Sauerstoffanteil von mindestens 30% aufweist. Preferably, the introduction of the predetermined breaking points by means of the laser device in an oxygen-containing atmosphere, which preferably has an oxygen content of at least 30%.
Die Ausdrucke „näherungsweise“, „im Wesentlichen“, „ca.“ oder „etwa“ bedeuten im Sinne der Erfindung Abweichungen vom jeweils exakten Wert um +/–10%, bevorzugt um +/–5% und/oder Abweichungen in Form von für die Funktion unbedeutenden Änderungen. The expressions "approximately", "substantially", "approximately" or "approximately" in the context of the invention mean deviations from the exact value by +/- 10%, preferably by +/- 5% and / or deviations in the form of for the function insignificant changes.
Weiterbildungen, Vorteile und Anwendungsmöglichkeiten der Erfindung ergeben sich auch aus der nachfolgenden Beschreibung von Ausführungsbeispielen und aus den Figuren. Dabei sind alle beschriebenen und/oder bildlich dargestellten Merkmale für sich oder in beliebiger Kombination grundsätzlich Gegenstand der Erfindung, unabhängig von ihrer Zusammenfassung in den Ansprüchen oder deren Rückbeziehung. Auch wird der Inhalt der Ansprüche zu einem Bestandteil der Beschreibung gemacht. Further developments, advantages and applications of the invention will become apparent from the following description of exemplary embodiments and from the figures. In this case, all described and / or illustrated features alone or in any combination are fundamentally the subject of the invention, regardless of their summary in the claims or their dependency. Also, the content of the claims is made an integral part of the description.
Die Erfindung wird im Folgenden anhand der Figuren an Ausführungsbeispielen näher erläutert. Es zeigen: The invention will be explained in more detail below with reference to the figures of exemplary embodiments. Show it:
Das Basissubstrat
Im vorliegenden Ausführungsbeispiel weise die erste Oberflächenseite
Insbesondere ist die erste Metallisierung
Die erste Metallisierung
Die erste und zweite Metallisierung
Bei Realisierung der Metallisierungen
Alternativ kann zumindest eine der Metallisierungen
Die Keramikschicht
Im vorliegenden Ausführungsbeispiel sind eine erste bis vierte Sollbruchlinie
Erfindungsgemäß werden schlitzartige Sollbruchlinien
Die Sollbruchlinien
Zur Herstellung im Mehrfachnutzen weist das Basissubstrat
Hierdurch entstehen weitere Kreuzungsbereiche K5 bis K9, in welchen in einer bevorzugten Ausführungsvariante der Erfindung die erste Tiefe T1 der Sollbruchlinien
Im Einzelnen ergibt sich im vorliegenden Ausführungsbeispiel ein fünfter Kreuzungsbereich K5 zwischen der ersten und sechsten Sollbruchlinie
Die Ausbildung der Querschnittsform der Sollbruchlinien
In einer ersten Ausführungsvariante der Erfindung kann die Laservorrichtung durch eine Laservorrichtung mit regelbarer Laserleistung gebildet sein, über welche der durch den Laserstrahl erzeugte Materialabtrag in der Keramikschicht
Die Beaufschlagung der jeweiligen Oberflächenseite
Alternativ ist eine Anordnung der Basissubstrate
Mittels genannter Laservorrichtungen sind kontinuierliche Vertiefungen bildende, schlitzartige Sollbruchlinien
In einer zweiten Ausführungsvariante des erfindungsgemäßen Verfahrens werden mittels der Laservorrichtung zunächst Sollbruchlinien
Insbesondere in den in den Eckbereichen des Basissubstrates
Auch kann in einer alternativen Ausführungsvariante die erste Tiefe T1 in den innerhalb des Basissubstrates
Der Übergang zwischen dem Bereich erster Tiefe T1 und zweiter Tiefe T2 kann entweder kontinuierlich oder stufenartig ausgebildet sein. Auch kann der Übergang einen konkaven, konvexen oder linearen Querschnittsverlauf aufweisen. The transition between the region of first depth T1 and second depth T2 may be formed either continuously or stepwise. Also, the transition may have a concave, convex or linear cross-sectional shape.
Zum Erzeugung einer hochqualitativen Bruchlinie kann das Basissubstrat
Auch kann die Erzeugung der Sollbruchstellen
Die Erfindung wurde voranstehend an Ausführungsbeispielen beschrieben. Es versteht sich, dass zahlreiche Änderungen sowie Abwandlungen möglich sind, ohne dass dadurch der der Erfindung zugrunde liegend Erfindungsgedanke verlassen wird. The invention has been described above by means of exemplary embodiments. It is understood that numerous changes and modifications are possible without thereby departing from the invention underlying the idea of the invention.
BezugszeichenlisteLIST OF REFERENCE NUMBERS
- 1 1
- Basissubstrat base substrate
- 1a–1d 1a-1d
- erster bis vierter Randabschnitt first to fourth edge section
- 2 2
- Metall-Keramik-Substrate Metal-ceramic substrates
- 3 3
- Keramikschicht ceramic layer
- 3.1 3.1
- erste Oberflächenseite first surface side
- 3.2 3.2
- zweite Oberflächenseite second surface side
- 4 4
- erste Metallisierung first metallization
- 5 5
- zweite Metallisierung second metallization
- 6a–6f 6a-6f
- erste bis sechste Sollbruchlinie first to sixth predetermined breaking line
- K1–K9 K1-K9
- erster bis neunter Kreuzungsbereich first to ninth intersection area
- L L
- Länge length
- P P
- Kreuzungspunkt intersection
- TL TL
- Teillänge partial length
- T1 T1
- erste Tiefe first depth
- T2 T2
- zweite Tiefe second depth
ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- US 3744120 [0003] US 3744120 [0003]
- DE 2319854 [0003] DE 2319854 [0003]
- DE 2213115 [0004] DE 2213115 [0004]
- EP 153618 A [0004] EP 153618 A [0004]
- EP 2315508 A1 [0008] EP 2315508 A1 [0008]
Claims (16)
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PCT/DE2014/100033 WO2014173391A1 (en) | 2013-04-22 | 2014-02-04 | Base substrate, metal-ceramic substrate produced from a base substrate and process for producing a base substrate |
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WO2017108950A1 (en) * | 2015-12-22 | 2017-06-29 | Heraeus Deutschland Gmbh | Method for the production of a metal-ceramic substrate using a pico-laser |
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DE102018119313B4 (en) | 2018-08-08 | 2023-03-30 | Rogers Germany Gmbh | Process for processing a metal-ceramic substrate and installation for carrying out the process |
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WO2022184773A1 (en) * | 2021-03-03 | 2022-09-09 | Rogers Germany Gmbh | Method for processing a metal-ceramic substrate, and metal-ceramic substrate |
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WO2014173391A1 (en) | 2014-10-30 |
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