摘要:
In the method, a conductive pad of the board is etched to a depth that is greater than 50% and less than 100% of a thickness of the conductive pad. Subsequently, a solder ball may be formed on the etched conductive pad. For example, the conductive pad may be copper.
摘要:
Semiconductor chip stack structure and method are provided. A first chip has a first metal bump formed on a first electrode pad. The first chip is attached to and electrically connected to a substrate. The electrical connection is made by a bump reverse bonding method in which one end of a bonding wire is ball-bonded to the substrate and the other end is stitch-bonded to the metal bump. The second chip is stacked on the first chip. The bonding wire is substantially parallel with a top surface of the first chip. Accordingly, the chip stack structure and method minimize a space between the first chip and the second chip, thereby reducing the total height of semiconductor chip stack.
摘要:
Semiconductor chip stack structure and method are provided. A first chip has a first metal bump formed on a first electrode pad. The first chip is attached to and electrically connected to a substrate. The electrical connection is made by a bump reverse bonding method in which one end of a bonding wire is ball-bonded to the substrate and the other end is stitch-bonded to the metal bump. The second chip is stacked on the first chip. The bonding wire is substantially parallel with a top surface of the first chip. Accordingly, the chip stack structure and method minimize a space between the first chip and the second chip, thereby reducing the total height of semiconductor chip stack.
摘要:
An improved bumped chip carrier (BCC) package according to the present invention includes a resin-molded lead frame encapsulating an attached semiconductor integrated circuit (IC) and a plurality of interconnecting wire bonds attaching a plurality of contact pads on the IC to an associated plurality of solder-covered external contact terminals that are integrated in the lead frame. By integrally processing the external contact terminals, bonding wires may be affixed using a single wire bonding process. A method for manufacturing the BCC package preferably includes a dual photoresist patterning process accompanied by a dual wet etching process to create a plurality of highly reliable external contact terminals having improved bonding between the contact terminals and the encapsulating resin mold.
摘要:
An ultra-thin semiconductor package includes a lead frame having a die pad and a plurality of leads surrounding the die pad. The die pad includes a chip attaching part to which a semiconductor chip is attached and a peripheral part integral with and surrounding the chip attaching part. The thickness of the chip attaching part is smaller than the thickness of the leads. The package device further includes bonding wires electrically connecting the chip to the leads, and a package body for encapsulating the semiconductor chip, bonding wires, die pad, and inner portions of the leads. A first thickness of the die pad is preferably between about 30-50% of a second thickness of the leads. An overall thickness of the package device is preferably equal to or less than 0.7 mm.
摘要:
An ultra-thin semiconductor package includes a lead frame having a die pad and a plurality of leads surrounding the die pad. The die pad includes a chip attaching part to which a semiconductor chip is attached and a peripheral part integral with and surrounding the chip attaching part. The thickness of the chip attaching part is smaller than the thickness of the leads. The package device further includes bonding wires electrically connecting the chip to the leads, and a package body for encapsulating the semiconductor chip, bonding wires, die pad, and inner portions of the leads. A first thickness of the die pad is preferably between about 30-50% of a second thickness of the leads. An overall thickness of the package device is preferably equal to or less than 0.7 mm.
摘要:
A structure of a TFT substrate for a high resolution digital x-ray detector, in which two TFT substrates are arranged to be a double substrate by overlapping each other such that an upper plate is moved ½ pixel distance with respect to a lower plate in a direction along one axis. Thus, a difference in movement between the upper and lower plates is a ½ pixel distance. Also, two virtual pixels are obtained from one pixel. Three TFT substrates are arranged to be a triple substrate by overlapping one another such that a middle plate is moved a ½ pixel distance with respect to a lower plate in a direction along an X axis and an uppermost plate is arranged by being moved a ½ pixel distance with respect to the lower plate in a direction along a Y axis. Thus, resolution is increased as data of one pixel is divided into four data to be analyzed and an measured value of a pixel of each overlapping substrate is compared.
摘要:
A high speed tool steel and a manufacturing method therefor are disclosed, in which carbides are formed in the matrix in a uniform manner, thereby obtaining a high toughness and a high abrasion resistance. The high speed tool steel according to the present invention includes a basic composition of W.sub.a Mo.sub.b Cr.sub.c Co.sub.d V.sub.x C.sub.y Fe.sub.z where the subscripts meet in weight %: 5.0%.ltoreq.a.ltoreq.7.0%, 4.0%.ltoreq.b.ltoreq.6.0%, 3.0%.ltoreq.c.ltoreq.5.0%, 6.5%.ltoreq.d.ltoreq.9.5%, 2.2%.ltoreq.x.ltoreq.8.3%, 1.1%.ltoreq.y.ltoreq.2.18%, and 66.52%.ltoreq.z.ltoreq.73.7%. The final structure has carbides uniformly distributed within a martensite matrix, which are mainly MC and M.sub.6 C carbides. The method includes the steps of melting the above-defined alloy composition, gas spraying the melted alloy to form a bulk material, heat treating the bulk material to decompose the M.sub.2 C carbides to stabilize M.sub.6 C carbides and hot working the heat treated bulk material to a desired shape.
摘要翻译:公开了一种高速工具钢及其制造方法,其中以均匀的方式在基体中形成碳化物,从而获得高韧性和高耐磨性。 根据本发明的高速工具钢包括WaMobCrcCodVxCyFez的基本组成,其中下标满足重量百分比:5.0% = a <7.0%,4.0% b = 6.0%,3.0% = c = 5.0%,6.5% = d = 9.5%,2.2% = x <= 8.3%,1.1% = 2.18%和66.52% /=z=73.7%。 最终结构具有均匀分布在马氏体基体内的碳化物,主要是MC和M6C碳化物。 该方法包括以下步骤:熔化上述合金组成,气体喷射熔化的合金以形成散装材料,热处理本体材料以分解M2C碳化物以稳定M6C碳化物并将热处理的散装材料热加工成所需的 形状。
摘要:
The present invention relates to a technique for effectively processing a large amount of video data which are generated by cameras (e.g., CCTV cameras). Particularly, the present invention relates to a video processing technique of image quality compensation, in which a compensation of image quality is periodically performed by high-resolution image switching when video streams of a plurality of resolution (e.g., 4K, 1K (Full-HD)) are provided from a camera, thereby maintaining storage capacity for storing videos at the level of low-resolution video and maintaining an object identification effect in video search at the level of high-resolution video.
摘要:
The present invention relates to a technique for effectively processing a large amount of video data which are generated by cameras (e.g., CCTV cameras). Particularly, the present invention relates to a video processing technique of image quality compensation, in which a compensation of image quality is periodically performed by high-resolution image switching when video streams of a plurality of resolution (e.g., 4K, 1K (Full-HD)) are provided from a camera, thereby maintaining storage capacity for storing videos at the level of low-resolution video and maintaining an object identification effect in video search at the level of high-resolution video.