摘要:
A semiconductor device having improved heat dissipation property and electrical characteristics and applicable to an integrated circuit having a multiplicity of electrodes, and a method of fabricating the semiconductor device are disclosed. A surface of a semiconductor chip (1) on which a bump (2) is formed is in face to face relation to a surface of a circuit substrate (3) on which a land (5) is formed. A polyimide tape (6) and a TAB lead (7) constitute a TAB tape. The bump (2) and the land (5) are electrically connected to each other through the flat TAB tape. The land (5) is electrically connected to an external connection electrode (4) through an interconnecting line within the circuit substrate (3). The TAB lead (7) extending from the bump (2) to the land (5) is reduced in length, and the signal through the TAB lead (7) accordingly has improved electrical characteristics. The use of the TAB tape permits the semiconductor device to be applied to the semiconductor chip (1) having the multiplicity of bumps (2).
摘要:
In a digital camera having multiple optical systems, multiple image capturing elements are effectively driven to reduce power consumption. A digital camera has a first image capturing optical system having a lens and a first image sensor and a second image capturing optical system having a lens and a second image sensor. A controller and timing generator selects the image signal from the first image capturing optical system while controlling an operation or power of the second image sensor and a clock driver to be OFF when the zoom position falls within a first zoom range. When the zoom position falls within a second zoom range, the image signal from the second image capturing optical system is selected while an operation or power of the first image sensor and a clock driver is controlled to be OFF. An operation or power of the image capturing optical system which is not selected is stopped so that power consumption is reduced.
摘要:
With an auxiliary electrode having a shape corresponding to the end of a workpiece attached to an upper electrode of a high frequency heater for high-frequency heating the end of the workpiece extruded, the workpiece is high-frequency heated intensively and uniformly between the auxiliary electrode and the lower electrode. After heating, the end of the workpiece is molded into a predetermined shape by a couple of stamping molds.
摘要:
An automobile window molding includes an elongated leg having an embedded core member, an outer head portion having a contact portion, an inner support portion, a seal lip and a position control portion. The molding is suited to position a window in a supporting window frame. The head portion is integrally formed at an upper end of the leg and extends over a portion of the front widow glass. The contact portion is defined by a projection positioned between the head portion and the inner support portion so as to touch the end surface of the front window glass. The inner support portion is formed at a lower end of the leg and is configured to touch an inner surface of the front window glass. The perimeter of the front window glass is held between the head portion and the inner support portion. At least one seal lip is formed on the leg so as to contact a window frame. The position control portion is preferably bent towards the window glass, such that the projection is disposed to be closer to the inner support portion than to the core member.
摘要:
In a two layer extrusion molding, a core part 11 is formed of hard resin material, a crease pattern 11a having a given depth, preferably, a depth in the range of 10 to 20 .mu.m is formed on the surface of the core part 11, and a skin part 12 formed of soft resin material is coated on the surface of the core part 11. Thus, the core part and skin part are effectively prevented from being detached from each other to thereby improving the quality of the molded product.
摘要:
A window molding for automobiles has an elongate leg fitted into a gap between a perimeter of a front window glass and a window frame. The molding holds the perimeter of the front window glass between an inner support and an outer support. A head is disposed at one end of the leg, the head having a lateral portion thereof extending over the outer support. A guide connects the lateral portion of the head and the outer support, the guide defining a distance between the lateral portion of the head and the outer support and being deformed according to a respective position along the perimeter of the front window glass. A guide groove is defined at least in part by the guide and opened toward the front window glass at least at side edges of the front window glass. A veil lip is disposed on the lateral portion of the head and forms an obtuse angle therewith at least at the side edges of the front window glass so that the veil lip extends toward the front window glass and defines another part of the guide groove. The guide is deformed at the upper edge of the front window glass to shorten the distance between the lateral portion of the head and the outer support so that the veil lip has a portion thereof bearing on the front window glass along the upper edge of the front window glass.
摘要:
A door lower molding that has a main body molded of a synthetic resin by extrusion. The main body is fixed along a lower end of a door of a vehicle. The main body has a seal lip extended thereon, which closely contacts a rocker molding of the vehicle body when the door is closed. A core made of a synthetic resin is embedded in the main body. The seal lip may be covered on its outer side with a skin which has a flaw resistance characteristic and on its inner side with a sealing layer including silicone to prevent freeze-sticking to the vehicle body.
摘要:
A material for dentistry having a low odor, a low stimulation and a proper dough stage time is here disclosed which is prepared by blending a monomer selected from the group consisting of (meth)acrylate compounds represented by the general formula ##STR1## R.sub.1 is a hydrogen atom or a methyl group, each of R.sub.3, R.sub.6 and R.sub.10 is an alkyl group, and each of R.sub.2, R.sub.5, R.sub.8 and R.sub.9 is an alkylene group) and (meth)acrylate dimers.
摘要:
A process for purifying methyl methacrylate which comprises treating methyl methacrylate having a purity of 99.5% or more containing a trace of impurities with a sulfonic acid group-containing compounds. According to the present invention, there can be obtained highly purified methyl methacrylate which exhibits an absorbance of 0.02 or less in a range of wavelength of 400-500 nm according to the sulfuric acid color method and is free of even a trace of furan-type compounds.
摘要:
A lead frame includes an outside frame portion having an central opening, and a rectangular mount portion supported by the outside frame portion and disposed within the central opening, and on which an electronic element is adapted to be mounted. The lead frame also includes at least one lead element array disposed along a side of the mount portion, respectively, the lead elements included in the array being connected to each other by a common tie bar element, and at least two expandable tie bar elements extending between the outside frame portion and each of the lead element arrays to support each lead element array by the outside frame portion, each of the expandable tie bar elements including a shaped portion which can be expanded by a deformation thereof. In a method of producing an electronic component using the lead frame, a process of bending the lead elements is performed before an electrolytic-plating process thereof.