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    • 71. 发明授权
    • Method for manufacturing high-density multilayer printed circuit boards
    • 高密度多层印刷电路板的制造方法
    • US6119338A
    • 2000-09-19
    • US44969
    • 1998-03-19
    • Tsung-Hsiung WangMan-Lin ChenChuang-Shin ChiouMing-Shun ChanPei-Wen Ding
    • Tsung-Hsiung WangMan-Lin ChenChuang-Shin ChiouMing-Shun ChanPei-Wen Ding
    • H05K3/00H05K3/04H05K3/40H05K3/42H05K3/46H01K3/10
    • H05K3/421H05K3/4069H05K3/4602H05K2201/0347H05K2201/0355H05K2201/0394H05K2201/09509H05K2201/0959H05K2201/096H05K2203/0554H05K2203/085H05K3/0035H05K3/0094H05K3/045H05K3/4644Y10T29/49126Y10T29/4913Y10T29/49156Y10T29/49165
    • A method for making high-density multilayer printed circuit boards is disclosed. It includes the steps of: (a) forming a pair of first conductive layers on top and bottom sides of a dielectric substrate; (b) forming first via holes through one of the first electrically conductive layers; (c) forming a blind hole through the dielectric substrate using a conformal laser drilling technique and filling the blind hole with an electrically conductive material; (d) forming a circuit pattern from the first electrically conductive layer; (e) forming a first electrically insulating layer on the first electrically conductive layer; (f) forming second via holes through the first electrically insulating layer using a non-conformal laser drilling technique; (g) forming a second electrically conductive layer covering the top surface of the circuit pattern, the first electrically insulating layer, and the side surface of the second via holes by electroplating; (h) forming a second electrically insulating layer on the first electrically conductive layer and filling the second via hole with the same electrically insulating material; (i) removing the second electrically insulating layer and the second electrically conductive layer above the second via hole; (j) forming a third electrically conductive layer on the first electrically insulating layer, wherein the third electrically conductive layer is in contact with the top edges of the second electrically conductive layer remaining on the cylindrical surface of the second via; (k) forming another circuit pattern on the third electrically conductive layer. Steps(e) through (k) can be repeated for more circuit patterns.
    • 公开了一种制造高密度多层印刷电路板的方法。 它包括以下步骤:(a)在电介质基片的顶面和底面上形成一对第一导电层; (b)通过所述第一导电层之一形成第一通孔; (c)使用共形激光钻孔技术通过介电基片形成盲孔,并用导电材料填充盲孔; (d)从第一导电层形成电路图案; (e)在第一导电层上形成第一电绝缘层; (f)使用非共形激光钻孔技术通过所述第一电绝缘层形成第二通孔; (g)通过电镀形成覆盖电路图案的顶表面,第一电绝缘层和第二通孔的侧表面的第二导电层; (h)在所述第一导电层上形成第二电绝缘层并用相同的电绝缘材料填充所述第二通孔; (i)在所述第二通孔上方去除所述第二电绝缘层和所述第二导电层; (j)在所述第一电绝缘层上形成第三导电层,其中所述第三导电层与残留在所述第二通孔的圆柱形表面上的所述第二导电层的顶部边缘接触; (k)在第三导电层上形成另一个电路图案。 可以重复步骤(e)至(k)以获得更多的电路图案。
    • 78. 发明授权
    • Electrically conductive projections
    • 导电突起
    • US5869787A
    • 1999-02-09
    • US846683
    • 1997-04-30
    • Salman Akram
    • Salman Akram
    • G01R1/067H01L21/768H01L23/13H01R12/55H05K3/04H05K3/06H05K3/40H05K1/00
    • G01R1/06738G01R1/06761H01L21/768H01L21/76838H01L21/76895H01L23/13G01R1/06744H01L2924/00013H01L2924/0002H05K3/048H05K3/064H05K3/4007Y10S438/902
    • An electrically conductive apparatus includes, a) an electrically non-conducting substrate, the substrate having a base surface and an adjacent elevated surface, the elevated surface being spaced from the base surface by a first distance thereby defining a step having a step wall; b) a capping layer of first electrically conductive material coating the elevated surface only portions of the step wall, the capping layer having outer top and outer side portions; and c) a conductive trace of second electrically conductive material which is different from the first electrically conductive material; the conductive trace overlying the substrate, portions of the step wall not covered by the capping layer, and the outer side portions of the capping layer. Methods are disclosed for producing such a construction, for forming an electrically conductive projection outwardly extending from a substrate, and for providing an electrical interconnection between adjacent different elevation areas on a substrate.
    • 导电装置包括:a)非导电衬底,所述衬底具有基底表面和相邻的升高表面,所述升高表面与所述基底表面隔开第一距离,从而限定具有台阶壁的台阶; b)第一导电材料的覆盖层,仅覆盖所述台阶壁的仅升高的表面,所述封盖层具有外顶部和外侧部分; 以及c)与所述第一导电材料不同的第二导电材料的导电迹线; 覆盖衬底的导电迹线,阶梯壁的未被覆盖层覆盖的部分以及覆盖层的外侧部分。 公开了用于制造这种结构的方法,用于形成从衬底向外延伸的导电突起,并且用于在衬底上的相邻不同高度区域之间提供电互连。