Method of making a printed circuit board having filled holes and fill
member for use therewith
    162.
    发明授权
    Method of making a printed circuit board having filled holes and fill member for use therewith 失效
    制造具有填充孔和填充构件的印刷电路板的方法

    公开(公告)号:US6079100A

    公开(公告)日:2000-06-27

    申请号:US76649

    申请日:1998-05-12

    Abstract: A method of making a circuitized substrate such as a printed circuit board having at least one hole therein which comprises the steps of providing a layer of dielectric, forming at least one (and preferably several) holes therein, positioning a thin layer of support material atop the dielectric layer and over the hole(s), positioning a quantity of fill material on the thin layer of support material (preferably before positioning the thin layer on the dielectric) and thereafter applying a predetermined force sufficient to cause the thin support layer to rupture or otherwise deform (including melting from heat application thereto) such that the fill material is forcibly driven into the accommodating hole(s). Subsequent steps can include forming a layer of circuitry on the substrate's external surface and over the filled holes such that an electrical component such as a ball grid array (BGA), semiconductor chip, etc. may be directly positioned on and/or over the hole(s). A fill member usable with the method is also provided.

    Abstract translation: 一种制造诸如印刷电路板的电路化基板的方法,其中具有至少一个孔,其包括以下步骤:提供介电层,在其中形成至少一个(并且优选几个)孔,将薄层的支撑材料定位在顶部 电介质层和孔之上,将一定量的填充材料定位在支撑材料的薄层上(优选在将薄层定位在电介质上之前),然后施加足以使薄载体层破裂的预定力 或以其他方式变形(包括从其加热熔化)使得填充材料被强制地驱动到容纳孔中。 随后的步骤可以包括在衬底的外表面上和填充的孔上形成电路层,使得电子部件例如球栅阵列(BGA),半导体芯片等可以直接定位在孔的上和/或上方 (s)。 还提供了可用于该方法的填充构件。

    Methods of selectively filling apertures

    公开(公告)号:US06066889A

    公开(公告)日:2000-05-23

    申请号:US158811

    申请日:1998-09-22

    Abstract: A novel method of filling apertures in substrates, such as through holes, is provided. The method utilizes a photoimageable film, and comprises the following steps: applying a photoimagable, hole fill film over the apertures; reflowing the hole fill film to flow into the apertures; exposing the hole fill film to actinic radiation, preferably ultraviolet light, through a phototool, which preferably has openings slightly larger than the diameter of the apertures; then at least partially curing the hole fill film; and developing the hole fill film to remove the unexposed hole fill film. An advantage of the present method is that the apertures may be selectively filled. After the apertures are filled, the hole fill film is cured, preferably by baking. Thereafter, the substrate is preferably subjected to further processing steps; for example, nubs of cured hole fill film are preferably removed. If desired, the substrate is circuitized. If desired, features are gold plated, such as for example, electrolessly gold plated. The hole fill film preferably has solids which comprise 0 to about 20% of a thixotrope and about 80% to about 100% parts of an epoxy resin system; the epoxy resin system comprises: from about 10% to about 80% of phenoxy polyol resin which is the condensation product of epichlorohydrin and bisphenol A, having a molecular weight of from about 40,000 to about 130,000; from about 20% to about 90% of an epoxidized multifunctional bisphenol A formaldehyde novolac resin having a molecular weight of from about 4,000 to about 10,000; from about 35% to about 50% of a diglycidyl ether of bisphenol A, preferably halogenated, and having a molecular weight of from about 600 to about 2,500; and from about 0.1 to about 15 parts by weight of the total resin weight, a cationic photoinitiator. The invention also relates to circuitized structures produced according to the method.

    Process of manufacturing a printed circuit board with plated landless
through-holes by the use of a filling material
    168.
    发明授权
    Process of manufacturing a printed circuit board with plated landless through-holes by the use of a filling material 失效
    通过使用填充材料制造具有镀覆无通孔的印刷电路板的工艺

    公开(公告)号:US5916736A

    公开(公告)日:1999-06-29

    申请号:US637888

    申请日:1996-04-25

    Abstract: A process of manufacturing a printed circuit board having plated landless through-holes involves filling a radiation curable putty material in through-holes plated with copper in a substrate, exposing the material under radiation of light in order to cure the material, placing a liquid resist on the substrate surface, covering a mask over the resist, exposing the resist layer by using a mask having a circuit pattern, developing the resist, etching the substrate surface, and removing the cured putty material in the through-holes and the remaining portion of the resist. The filling material composition used in the process comprises hydrophthalic mono ester compound as a component (A), a catalyst for promoting photo polymerization of a vinyl group in the mono ester as a component (B), a highly transparent rosin having a Hazen color tone of 300 or less for the improvement of cure depth of the material after exposure of light as a component (C), and a powder of at least one extender selected from polyethelene, nylon, polyester, talc, silica, aluminum hydroxide, titanium oxide, barium sulfate, kaolinite, calcium carbonate, and phthalocyanine as a component (D).

    Abstract translation: 一种制造具有电镀无置入通孔的印刷电路板的方法包括在基板上镀铜的通孔中填充可辐射固化油灰材料,在光照射下曝光该材料以固化该材料, 在基板表面上,在抗蚀剂上覆盖掩模,通过使用具有电路图案的掩模曝光抗蚀剂层,显影抗蚀剂,蚀刻基板表面,以及去除通孔中的固化的腻子材料,以及其余部分 抗拒。 该方法中使用的填充材料组合物包含作为组分(A)的亲水性单酯化合物,用于促进作为组分(B)的单酯中的乙烯基的光聚合的催化剂,具有Hazen色调的高透明松香 为了提高作为(C)成分的光的曝光后的材料的固化深度,为300以下的粉末,以及选自聚乙烯,尼龙,聚酯,滑石,二氧化硅,氢氧化铝,氧化钛, 硫酸钡,高岭石,碳酸钙和酞菁作为组分(D)。

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