摘要:
A through hole 5 formed in a substrate and having an electrode film on an inner surface thereof is cut and divided into two through holes or blind holes each of substantially semicircular arc shape through dicing processing using a rotating blade, and one of the-divided through holes 5 of substantially semicircular arc shape is used as an external connection terminal 3 of substantially semicircular concave arc shape thereby to form a surface mounted electronic parts having a plurality of the external connection terminals 3. The height H of the substantially semicircular arc formed at an inner surface of each of the external connection terminals is set to be equal to or smaller than a value obtained by subtracting twice a thickness t of the electrode film from a radius R of a curvature of the arc.
摘要:
A circuit board for mounting a part having a plurality of bumps by ultrasonic bonding. The circuit board includes a main body and a conductive layer provided on the main body. The conductive layer has a conductive pattern having at least one bonding area configured to correspond to the plurality of bumps of the part. The conductive layer has an isolated notch part located proximate the at least one bonding area.
摘要:
A wiring board having a conductor layer formed on a substrate and a connecting pad disposed in a connecting pad disposition portion provided in part of the conductor layer surface, the conductor layer having a resin inflow prevention portion which is provided adjacently to the said connecting pad disposition portion and which has a surface roughness greater than the surface roughness of the said connecting pad disposition portion, the resin inflow prevention portion being capable of overcoming the problem of prior art that an adhesive resin (resin layer) of a prepreg or an adhesive flows out onto the upper surface of the pad, due to its softening under heat and its being pressurized for bonding when a structure member such as a cover layer is bonded to the wiring board, and forms a cured resin which extremely inhibits the bonding property of a chip element onto the pad.
摘要:
An electronic part in which a chip 2 having bump electrodes is sealed in a cavity 14 of a resin container 10, wherein the resin container having: a mounting board 1 having a conductor pattern 4 for bump-mounting the chip 2; an intermediate board 5 overlaid on the mounting board 1 and having a window for forming an inner wall apart from the chip 2 for predetermined distances; a cover board overlaid on the intermediate board 5 to cover the window; a first adhesive layer 8 which is interposed between overlaid portions of the mounting board 1 and the intermediate board 5; and a second adhesive layer 9 which is interposed between overlaid portion of the intermediate board 5 and the cover board 7, wherein the first and second adhesive layers 8 and 9 between which the intermediate board 5 is interposed are heated and pressed at a time in a direction of the thickness of each of the mounting board 1 and the cover board 7, and the mounting board 1, the intermediate board 5 and the cover board 7 are brought into intimate contact with one another so as to seal and form the cavity 14 defined by the inner wall of the window.
摘要:
A resin package fabrication processes comprises three steps. At the first step, a thermosetting resin-containing resin substrate is machined. At the second step carried out after the first step, the resin substrate is heated to an original glass transition temperature that the resin substrate has or a temperature that is higher than the glass transition temperature so that the glass transition temperature that the resin substrate has is elevated to a new glass transition temperature. At the third step, a resin layer is placed on at least a portion of the resin substrate to which the new glass transition temperature is imparted, and the resin substrate with the resin layer placed on that portion is then heated to the original glass transition temperature or a temperature between the original glass transition temperature and the new glass transition temperature, thereby fixing the resin layer to the resin substrate.
摘要:
A water treatment apparatus including a mixing bath having an open portion where a carbonic acid gas intermixed with water to be treated by the water treatment apparatus and dissolved oxygen excluded from the water to be treated are discharged. The water treatment apparatus also includes water storage tank separate from the mixing bath and in which treated water from the mixing bath is stored.
摘要:
A production method of an electronic part comprising a step o working a substrate having formed thereon a metal thin-film conductor using water, wherein said water satisfies the relations 3.5≦pH≦6.5 and DO≦0.5 pH2−6.5 pH+22 [wherein DO represents a dissolved oxygen amount (unit ppm)]. By using the water in the case of working substrates in the production steps of electronic parts, the generations of the static electricity and the oxidation caused by water used for working are restrained. The present invention is particularly effective in working of an electronic part wherein a metal thin-film conductor containing at least two kinds of metals including Al on a substrate having a pyroelectric property.
摘要:
When connecting electrodes of a chip device CP are ultrasonic-bonded to circuit electrodes provided for a resin substrate 10 to mount the chip device CP on the resin substrate 10, a heater 5 for heating the resin substrate 10 is provided with which the temperature of the resin substrate 10 is raised to a level with which the ratio of elastic modulus &egr;h realized when heat is supplied with respect to elastic modulus &egr;r of the resin substrate 10 at room temperature satisfies 1>&egr;h/&egr;r≧0.5. The heater 5 may be provided for the substrate retaining frame 4.
摘要:
In a chip device in which not only an electrode pattern 25 is provided on a main mounting surface 21a of a base 21 but also bump electrodes 22 are provided as external electrodes for face-down mounting, an electrically insulating layer 31 is provided to be put on at least a part of the main mounting surface 21a so as to remain edge portions which do not cover at least a part of the electrode pattern 25, and a protection layer 32 for protecting the main mounting surface is further provided at a distance from the main mounting surface 21a so as to be put on the electrically insulating layer 31, so that the bump electrodes 22 are connected to the electrode pattern 25 while being in contact with the edge portions of the electrically insulating layer 31 and the protection layer 32.
摘要:
A chip junction nozzle in that opposite slant planes 43 which come into contact with edges of 2 sides of the chip in parallel centering around a nozzle center, and a vacuum suction hole 42 opened in the nozzle center are provided, and the slant plane 43 is formed into a mirror surface having the surface hardness more than HrC40. Further, when the surface roughness of the mirror surface is expressed by the average roughness of the center line, the average roughness of the center line is not more than 1.6 &mgr;m.