{"id":4805,"date":"2026-03-12T09:17:05","date_gmt":"2026-03-12T09:17:05","guid":{"rendered":"https:\/\/flj-pcb.com\/?p=4805"},"modified":"2026-03-12T09:33:13","modified_gmt":"2026-03-12T09:33:13","slug":"pcb-blind-and-buried-via-manufacturing-process-guide","status":"publish","type":"post","link":"https:\/\/flj-pcb.com\/de\/pcb-blind-and-buried-via-manufacturing-process-guide\/","title":{"rendered":"PCB Blind und Buried Via Herstellungsprozess Leitfaden"},"content":{"rendered":"<h2 class=\"wp-block-heading\">1. \u00dcberblick<\/h2>\n\n\n\n<p>Blind Vias und vergrabene Durchkontaktierungen werden haupts\u00e4chlich f\u00fcr Leiterplatten mit hoher Dichte und f\u00fcr Leiterplatten mit sehr kleinen L\u00f6chern verwendet. Ziel ist es, Platz f\u00fcr das Routing zu sparen und so die Leiterplatte kleiner zu machen. Ein g\u00e4ngiges Beispiel sind Leiterplatten f\u00fcr Mobiltelefone.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">2. Klassifizierung<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">A) Laserbohren<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">1. Gr\u00fcnde f\u00fcr den Einsatz des Laserbohrens<\/h4>\n\n\n\n<p>a. Der Kunde w\u00fcnscht eine Laserbohrung.<br>b. Blind Vias k\u00f6nnen sehr klein sein (&lt;= 6 MIL), so dass nur ein Laser sie zuverl\u00e4ssig bohren kann.<br>c. F\u00fcr spezielle Stapel von Blind- und vergrabenen Durchkontaktierungen - zum Beispiel, wenn es eine Blinddurchkontaktierung von L1 nach L2 und eine vergrabene Durchkontaktierung von L2 nach L3 gibt - ist Laserbohren erforderlich.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">2. Das Prinzip des Laserbohrens<\/h4>\n\n\n\n<p>Beim Laserbohren wird die Hitze des Lasers genutzt, um das Plattenmaterial zu verdampfen oder zu schmelzen und ein Loch zu bohren. Damit dies funktioniert, muss das Plattenmaterial die Laserenergie absorbieren. Aus diesem Grund werden in der Regel RCC-Materialien verwendet, da sie kein Glasfasergewebe enthalten und daher den Laser nicht reflektieren.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">3. Kurze Einf\u00fchrung in das RCC-Material<\/h4>\n\n\n\n<p>RCC bedeutet Resin Coated Copper. Es handelt sich um eine Kupferfolie, die auf der rauen Seite der elektrolytischen Kupferfolie mit einer speziellen Harzschicht versehen ist.<br>In unserem Unternehmen haben wir drei Lieferanten f\u00fcr RCC: Shengyi, Mitsui und LG.<br>Materialoptionen: Harzst\u00e4rke 50, 65, 70, 75, 80 \u00b5m, Kupferfolienst\u00e4rke 12, 18 \u00b5m, etc.<br>RCC gibt es mit hoher Tg und niedriger Tg. Seine Dielektrizit\u00e4tskonstante ist in der Regel niedriger als die von Standard-FR-4. Shengyi's S6018 hat beispielsweise eine Dielektrizit\u00e4tskonstante von 3,8, also Vorsicht, wenn Sie eine Impedanzkontrolle ben\u00f6tigen.<br>F\u00fcr Einzelheiten zu bestimmten Materialien wenden Sie sich bitte an das PE (Product Engineering) oder RD (Research &amp; Development) Team.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">4. Werkzeuge und Werkzeuganforderungen f\u00fcr das Laserbohren<\/h4>\n\n\n\n<p>A) Der Laser kann nur schwer durch Kupfer brennen. \u00c4tzen Sie daher vor dem Laserbohren einen Kupferabstand an den Positionen der Sacklochbohrung. Der Abstand sollte der Gr\u00f6\u00dfe des fertigen Lochs entsprechen.<br>B) Positionierungsmarken f\u00fcr das Laserbohren werden auf der Schicht L2 \/ L(N-1) hinzugef\u00fcgt. Markieren Sie dies auf der Seite MI-Filmwechsel.<br>C) Die Folie zum \u00c4tzen von Blind-Via-Spots muss von LDI hergestellt werden. Geschnittene Platten und Werkzeuge m\u00fcssen die LDI-Plattengr\u00f6\u00dfe verwenden.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">5. Merkmale des Produktionsflusses<\/h4>\n\n\n\n<p>A) Wenn die Gesamtzahl der Lagen N betr\u00e4gt, werden zuerst die L2-L(N-1)-Lagen nach dem normalen Verfahren f\u00fcr die inneren Lagen hergestellt.<br>B) Nach dem Laminieren und dem Fr\u00e4sen der Platinenumrisse \u00e4ndern Sie den Fluss wie folgt:<br>\u2192 LDI-Registrierl\u00f6cher bohren \u2192 Film trocknen \u2192 Blind-Via-Spots \u00e4tzen \u2192 Laser bohren \u2192 L\u00f6cher durchbohren \u2192 Kupfer stromlos machen \u2192 (normales Verfahren).<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">6. Andere Anmerkungen<\/h4>\n\n\n\n<p>A) RCC-Materialien sind in vielen F\u00e4llen nicht UL-zertifiziert. F\u00fcgen Sie also vorerst kein UL-Zeichen zu diesen Platten hinzu.<br>B) Zu Plattenlayout und MI: Um zu vermeiden, dass Layouts, die RCC enthalten, als unechte Platten behandelt werden (die MI-Filmwerkstatt stellt unechte Folien anders her als normale Folien), trennen Sie RCC von L2 oder L(N-1), wenn Sie die Plattenstruktur zeichnen. Siehe zum Beispiel SR2711\/01 Plattenaufbau.<br>C) IPC-6016 ist der Standard f\u00fcr HDI-Platten:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Laser-Blinddurchgang Wand Kupferst\u00e4rke: 0,4 mil (min).<\/li>\n\n\n\n<li>Anforderung an die L\u00f6tnaht: Tangentialit\u00e4t ist erlaubt.<\/li>\n\n\n\n<li>Wenn die Gr\u00f6\u00dfe des Pads nicht mehr als 5 mil gr\u00f6\u00dfer ist als der Lochdurchmesser, sollten Sie einen Teardrop hinzuf\u00fcgen.<br>D) Halten Sie die Plattenkante \u2265 0,8\u201d.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"800\" height=\"548\" src=\"https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/03\/SR2711-01-panel-layout.webp\" alt=\"SR2711-01 panel layout\" class=\"wp-image-4806\" srcset=\"https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/03\/SR2711-01-panel-layout.webp 800w, https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/03\/SR2711-01-panel-layout-300x206.webp 300w, https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/03\/SR2711-01-panel-layout-768x526.webp 768w, https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/03\/SR2711-01-panel-layout-18x12.webp 18w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">B) Mechanisches Bohren f\u00fcr Blindbohrungen\/vergrabene Durchf\u00fchrungen<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">1. Anwendungsbereich<\/h4>\n\n\n\n<p>Wenn die Bohrergr\u00f6\u00dfe \u2265 0,20 mm ist, sollten Sie mechanisch bohren.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">2. Beschichtungsverfahren f\u00fcr Blind-\/Buried Vias (siehe RD-Mitteilung TSFMRD-113)<\/h4>\n\n\n\n<p>A) Normalerweise darf die Kupferoberfl\u00e4che eines Schaltkreises auf jeder Schicht nur einen Plattierungsschritt und einen Musterplattierungsschritt aufweisen.<br>B) Normalerweise m\u00fcssen Durchgangsl\u00f6cher nach Abschluss des vollst\u00e4ndigen Laminiervorgangs und bei einer Plattendicke von \u2265 80 MIL mit einer Platte und einem Muster plattiert werden. Daher darf bei der Beschichtung von Blind Vias die Oberfl\u00e4che der Au\u00dfenschicht nicht plattiert werden.<br>C) Wenn die beiden oben genannten Punkte erf\u00fcllt sind, wird die Blind-Via-Beschichtung wie folgt durchgef\u00fchrt:<br>I) Wenn die Leiterbahnbreite der Au\u00dfenschicht &gt; 6 MIL und die Dicke der durchkontaktierten Leiterplatte &lt; 80 MIL ist, kann die Oberfl\u00e4che der Au\u00dfenschicht w\u00e4hrend der Blind-Via-Beschichtung mit der Leiterplatte beschichtet werden.<br>II) Wenn die Leiterbahnbreite der Au\u00dfenschicht &gt; 6 MIL, die Dicke der Durchgangsbohrung jedoch &gt; 80 MIL ist, muss die Oberfl\u00e4che der Au\u00dfenschicht w\u00e4hrend der Blind-Via-Beschichtung mit einem Film gesch\u00fctzt werden.<br>III) Wenn die Leiterbahnbreite der Au\u00dfenschicht &lt; 6 MIL und die Dicke der Durchgangslochplatte \u2265 80 MIL ist, muss die Oberfl\u00e4che der Au\u00dfenschicht w\u00e4hrend der Blind-Via-Beschichtung mit einem Film gesch\u00fctzt werden.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">3. Filmverfahren (L\u00f6tmaske\/Trockenfilm)<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Wenn das Blind-Via-Seitenverh\u00e4ltnis L\/D \u2264 0,8 ist, wird ein trockener Film auf die Au\u00dfenschicht aufgebracht und die gesamte Platte belichtet. Dann werden die Innenfl\u00e4chen der Blindvia-Schichten als ganze Platte stromlos beschichtet.<\/li>\n\n\n\n<li>Wenn das Blind-Via-Seitenverh\u00e4ltnis L\/D &gt; 0,8 ist, bringen Sie einen trockenen Film auf der Au\u00dfenschicht an und belichten Sie nur die Blind-Via-Punkte. Dazu m\u00fcssen Sie einen Belichtungsspotfilm herstellen oder LDI-Belichtung verwenden. Dann werden die Blind-Via-Oberfl\u00e4chen der Innenschichten als ganze Platte stromlos beschichtet.<\/li>\n<\/ol>\n\n\n\n<h4 class=\"wp-block-heading\">4. Methoden zur Belichtung von Blindg\u00e4ngern<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li>F\u00fcr Blind Vias \u2264 0,4 mm (16 MIL) verwenden Sie LDI, um die Blind-Via-Stellen freizulegen.<\/li>\n\n\n\n<li>F\u00fcr Blind Vias &gt; 0,4 mm (16 MIL) verwenden Sie einen Film, um die Blind-Via-Stellen zu belichten.<\/li>\n<\/ol>\n\n\n\n<h4 class=\"wp-block-heading\">5. Schichtverfahren f\u00fcr vergrabene Durchkontaktierungen<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Wenn die Leiterbahnbreite der Buried-Via-Seite \u2264 4 MIL ist, ben\u00f6tigt die Buried-Via-Oberfl\u00e4che einen Film, um die Punkte freizulegen.<\/li>\n\n\n\n<li>Wenn die Leiterbahnbreite der Buried-Via-Seite &gt; 4 MIL ist, kann die Buried-Via-Oberfl\u00e4che direkt plattiert werden.<\/li>\n<\/ol>\n\n\n\n<h4 class=\"wp-block-heading\">6. Anmerkungen und Merks\u00e4tze<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li>F\u00fcr das Seitenverh\u00e4ltnis L\/D: L = Dicke des Dielektrikums + Dicke des Kupfers, D = Durchmesser des blinden\/vergrabenen Durchgangs.<\/li>\n\n\n\n<li>F\u00fcr Blind-\/Buried Via-Plating-Filme: Belichtungspunktdurchmesser D_spot = D - 6 (MIL).\n<ul class=\"wp-block-list\">\n<li>Bringen Sie Ausrichtungsmarkierungen auf dem Belichtungsspotfilm an. Ihre Koordinaten m\u00fcssen mit den \u00e4u\u00dferen Referenzl\u00f6chern \u00fcbereinstimmen.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Blinde Durchkontaktierungen, die mit einer Folie gesch\u00fctzt werden m\u00fcssen, werden in der Regel w\u00e4hrend der Galvanisierung mit Impulsstrom (AC) beschichtet.<\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">3. Besondere Anforderungen und Verfahrenshinweise f\u00fcr Blind-via-Platten<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Harzgef\u00fcllte Blind Vias<\/strong>:<br>Bei gro\u00dfen vergrabenen Vias und vielen L\u00f6chern kann das Pressen der Leiterplatte viel Harz erfordern, um die Vias zu f\u00fcllen. Um zu vermeiden, dass sich dies auf die endg\u00fcltige Plattendicke auswirkt, kann F&amp;E verlangen, dass die vergrabenen Durchkontaktierungen vor dem Laminieren mit Harz gef\u00fcllt werden. Die F\u00fcllmethode kann der gr\u00fcnen L\u00f6tmasken-Via-F\u00fcllmethode folgen.<\/li>\n\n\n\n<li><strong>Wenn die \u00e4u\u00dfere Schicht Blind Vias hat<\/strong>:<br>a. Beim Pressen kann aus der \u00e4u\u00dferen Schicht Harz austreten. F\u00fcgen Sie daher nach dem Laminieren einen Schritt zur Harzentfernung (Entgummierung) hinzu.<br>b. Vor dem Trocknen der Au\u00dfenschicht wird die Leiterplattenoberfl\u00e4che gereinigt und poliert. Chemisches Kupfer (stromloses Kupfer) ist sehr d\u00fcnn (nur 0,05-0,1 mil), so dass es beim Polieren abgetragen werden kann. Um dies zu vermeiden, f\u00fcgen Sie einen Schritt der Plattenbeschichtung hinzu, um das Kupfer zu verdicken. Typischer Ablauf: Laminierung \u2192 Harzentfernung \u2192 Bohren \u2192 stromloses Kupfer \u2192 Plattenbeschichtung \u2192 Trockenfilm \u2192 Musterbeschichtung.<\/li>\n\n\n\n<li><strong>Blind-via-Platten mit hoher Lagenzahl und PIN-LAM<\/strong>:<br>Bei der Herstellung von Leiterplatten mit vielen Lagen und Blind Vias kann die PIN-LAM-Laminierung verwendet werden. Beachten Sie, dass unsere Maschinen nur PIN-LAM-L\u00f6cher bohren k\u00f6nnen, wenn die Kerndicke weniger als 30 MIL betr\u00e4gt. In vielen F\u00e4llen verwenden wir nach wie vor die normale Laminierung; PR4726010 wird zum Beispiel mit normaler Laminierung hergestellt.<\/li>\n\n\n\n<li><strong>Bordkante<\/strong>:<br>Da es mehrere Laminierungen und viele Bearbeitungsl\u00f6cher geben kann, lassen Sie den Rand der Platte \u2265 0,8\u201d.<\/li>\n\n\n\n<li><strong>LOT-Karte und Tafelanschrieb<\/strong>:<br>Beim Schreiben der LOT-Karte m\u00fcssen Sie f\u00fcr Unterprozesse die Panelstruktur f\u00fcr den einzelnen Unterprozess und die Panelstruktur des Hauptprozesses in die besonderen Anforderungen schreiben. Dies hilft bei sp\u00e4teren Operationen.<\/li>\n\n\n\n<li><strong>Wohin mit der trockenen Blindfolie (innere oder \u00e4u\u00dfere Schicht)<\/strong>:<br>Beispiele: Ist die A-Dicke des Kerns gr\u00f6\u00dfer als 12 MIL (ohne Kupferdicke), dann legen Sie die Trockenfolie auf die Au\u00dfenschicht. Wenn die A-Dicke des Kerns weniger als 12 MIL betr\u00e4gt (ohne Kupferdicke), dann legen Sie die Trockenfolie auf die Innenschicht.<\/li>\n<\/ol>\n\n\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">4. Schnelle Erinnerungen und gepr\u00fcfte Werte<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Halten Sie die Plattenkante \u2265 0,8\u201d.<\/li>\n\n\n\n<li>Laser blind-via Wand Kupfer \u2265 0,4 mil.<\/li>\n\n\n\n<li>Bei einem Gr\u00f6\u00dfenunterschied zwischen Pad und Loch von \u2264 5 mil wird die Verwendung von Teardrops empfohlen.<\/li>\n\n\n\n<li>Verwenden Sie RCC zum Laserbohren, da RCC den Laser absorbiert.<\/li>\n\n\n\n<li>Bei der Blind-\/Buried-Via-Beschichtung sind die Leiterbahnbreite der Au\u00dfenschicht und die Gesamtdicke der Leiterplatte zu pr\u00fcfen, um zu entscheiden, ob die Platte beschichtet oder mit Folie gesch\u00fctzt werden soll.<\/li>\n\n\n\n<li>L\/D = (Dielektrikum + Kupfer) \/ Lochdurchmesser. Verwenden Sie diesen Wert, um Belichtungs- und Filmverfahren auszuw\u00e4hlen.<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>1. Overview Blind vias and buried vias are mainly used for high-density boards and for boards with very small holes. 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