Verfahren zum Aufbringen einer Metallisierung auf einem Isolator und zum Öffnen von Durchgangslöchern in diesem mittels derselben Maske
摘要
A process is disclosed for applying a metallisation layer on an insulator and for piercing through-holes in the insulator with one and the same mask. A substrate (1) has a first (3) and a second (4) insulating layer on its surface (2), a covering layer (5) on the second insulating layer (4), a structured masking layer (6) on the covering layer (5) and metal-filled through-holes (7) that extend from the rear side of the substrate to its surface (2). The masking layer (6) is structured in such a way that it has openings in the areas located above the through-holes (7) and in the areas to be provided with a metallic layer (7). The covering layer (5) is pierced in the areas that are not covered by the structured masking layer (6) by a first etching process. The second insulating layer (4) is then laser ablated in the areas located above the metal-filled through-holes (7) by means of a dielectric mask. The first insulating layer (3) in the areas located above the metal-filled through-holes (7) and the second insulating layer (4) in the areas to be provided with a metallic layer (8) are then pierced at the same time by a second etching process. The through-holes (7) are thus completely freed from the first insulating layer (3), the second insulating layer (4) is completely removed from the areas to be provided with a metallic layer (8) and the first insulating layer (3) remains substantially intact on the surface (2) of the substrate.
申请公布号
DE19509231(A1)
申请公布日期
1996.09.19
申请号
DE1995109231
申请日期
1995.03.17
申请人
INTERNATIONAL BUSINESS MACHINES CORP., ARMONK, N.Y., US