摘要:
A plurality of green sheets are prepared, and at least one board pattern is formed on each of the sheets. The sheets are laminated and bonded with each other to form a multi-layer board. The unsintered multi-layer board is cut by irradiating the periphery of at least one board pattern on the surface of the multi-layer board with laser light. When the multi-layer board is cut, the width of the cut portion of the multi-layer board is measured. The cutting width is held constant by controlling the velocity at which the multi-layer board is cut, according to the measured width. Thus a section in the multi-layer board where at least one board pattern is formed is cut away from the other section of the multi-layer board. The cut away multi-layer board is then sintered. As a result, a multi-layer board is produced.
摘要:
A work having a number of solder bumps on a substrate is mounted on a work positioning mechanism, and scanned by an optical micro head to measure errors of a mount posture of the work. Each stage is controlled to correct the errors, and thereafter, the apex positions of the bumps are scanned and measured. The measurement results are collected by a personal computer, and the measurement results together with control data of each axis are sent to a main personal computer and displayed on its screen. An error of an apex position of each bump from a regression plane is calculated, and if the error is smaller than a reference value, the work is judged to be good.
摘要:
A selective working method in which the surface to be worked of a workpiece is locally irradiated with energy beams and an electroless plating solution or an electroless etching solution is contacted with the irradiated workpiece surface, with the electroless plating solution or the electroless etching solution flowing continuously in the substantially same direction of as the direction of an irradiation of energy beams. The electroless plating of the electroless etching can be conducted selectively by this method. Above selective working method is best suited for the formation or correction (repair, filling up etc.) of micro-patterns on the workpiece such as metals, semi-conductors, insulators, etc.
摘要:
An improved placing method and placing apparatus are provided for placing conductive balls in a predetermined pattern onto a base unit. In the placing method for placing balls having conductivity in a predetermined pattern onto one surface of the base unit, an arrangement member has one surface, another surface opposite to the one surface of the arrangement member and positioning openings, wherein the positioning openings are arranged corresponding to the pattern such that the openings are through from the one surface to the another surfaces of the arrangement member so that the balls are inserted therein. The another surface of the arrangement member is positioned opposite to the one surface of the base unit. The arrangement member has two or more line members of which the core axes are substantially aligned. The transfer device is arranged in a manner that the line members are substantially in a horizontal position to contact with the balls supplied to one surface of the arrangement member, and then the transfer device is horizontally moved with respect to the one surface of the arrangement member. Then, the balls are placed on the one surface of the base unit through the positioning openings.
摘要:
A process for manufacturing electronic circuits, according to which soldering can be carried out without using flux by applying a metal surface treatment procedure which allows oxide film, organic matters, carbon or the like on the surface of metal to be easily removed without using a complex process nor unfavorably affecting electronic devices or circuit substrates. A process of connecting an electronic device and a circuit substrate by means of solder comprises the steps of irradiating the solder with a laser beam to clean the solder, aligning and mounting the electronic device on the circuit substrate, and hot-melting said solder in a low-oxygen content atmosphere to bond the electronic device and the circuit substrate.
摘要:
A method of modifying an electronic circuit board by performing disconnection or connection of conductive lines at a specified or an arbitrary position of the conductive lines of the electronic circuit board thereby changing an electric circuit and of completely modifying an open pattern defect of the conductive lines or an insulator layer, and its device, wherein a first energy beam is irradiated to portions of repair terminals 9 and 9' which are intended to connect or disconnect, of conductive lines 5 and 5' in the electronic circuit board thereby removing a protection layer, making windows and exposing the terminals 9 and 9' for connection; a second energy beam is irradiated thereby disconnecting the repair terminals 9 and 9', or a metal piece for connecting is supplied to between the repair terminals 9 and 9' and applying an energy thereto thereby electrically connecting them; and the disconnected or connected windowed portion is locally coated with the insulator layer thereby modifying the conductive lines of the electronic circuit board. Further, windows 311 or 311' is formed in an insulating protection layer 310 on a conductive line connecting portion 308 formed in a couple or a conductive line disconnecting portion 309, a conductive line of the conductive line disconnecting portion is disconnected or a liquid material 312 for connecting conductive lines is supplied to the conductive line connecting portion 308, a metal layer 313 is precipitated by heating the liquid material 312 thereby connecting the conductive line connecting portion 308, and the window 311 or 311' is coated with an organic insulator layer.
摘要:
A drilling method and a drilling apparatus of a hard brittle material in which a core drill is used for abrasive grinding of high accuracy and high durability. Therefore, the structure of this invention comprises: a tubular core drill; a collet chuck for holding the core drill, including a chuck main body of an integral shape which is hollow, a seal joint provided on the chuck at the inlet side of the lubricant, a slit portion of a pin vise type for holding the core drill, which slit portion is provided on the chuck at the outlet side of the lubricant, and a seal portion provided axially inside of the slit portion, which seal portion has an inner diameter substantially equal to an outer diameter of the core drill applied to the seal portion, and a threaded portion formed on the outer periphery of a portion further axially inside of the seal portion, so that after inserting the core drill into the seal portion, a fastening nut is engaged with and tightened on the threaded portion to thereby seal and fix the core drill, and that the lubricant at a high pressure can be supplied into a central space of the core drill; and a structure for delivering the lubricant through the inner passage of the core drill.
摘要:
A multi-channel module with a plurality of chips is mounted on a multilayer circuit board and has a simple and highly reliable structure cooling system for cooling the heat generated by the chips consuming a large amount of electric power. The cooling system uses in the horizontal direction a coolant supply pipe having straight tube sections and flexible bellows sections alternately disposed in the axial direction of the pipe. The straight tube sections of the aforesaid coolant supply pipe are brought into contact with the upper faces of the chips by a spring force so as to cool continuously the plurality of chips with the coolant flowing in one coolant supply pipe thereby providing a simply structured cooling system for chips. Such a structured cooling system enables the collective assembly of cooling parts for a plurality of chips with only a small number of parts and produces highly reliable effects thereby being able to implement the miniaturization of a main frame computer.
摘要:
Improved placing method and apparatus are provided for placing conductive balls in a predetermined pattern onto one surface of a base unit. An arrangement member is provided to have one surface, another surface opposite to the one surface of the arrangement member and positioning openings. The positioning openings are arranged corresponding to the pattern so that the balls are inserted therein. The another surface of the arrangement member is opposite to the one surface of the base unit. The arrangement member has two or more line members whose core axes are substantially aligned. The transfer device is arranged so that the line members are substantially in a horizontal position to contact with the balls, and then the transfer device is horizontally moved with respect to the one surface of the arrangement member. Then, the balls are placed on the one surface of the base unit through the positioning openings.
摘要:
Electric conductor patterns including antenna coils are formed on one surface of a film. Electronic components are fixed onto the film by a temporary fixing material. A cover film is laminated on the film so that the electrically conductive patterns and the electronic components are covered with the cover film. Simultaneously with the lamination, the electronic components are connected to the electric conductor patterns.