Soft package photoelectric coupler method and soft package photoelectric coupler
An optocoupler and soft package technology, which is applied in the field of optocouplers, can solve the problems of contaminating the circuit substrate chip, the limitations of plastic sealing and welding cannot meet the requirements, and the product cannot be used normally, and achieves the effect of preventing light leakage.
Inactive Publication Date: 2022-03-04
西安华芯微半导体有限公司
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Problems solved by technology
[0003] In the assembly of hybrid circuits, optocouplers are also widely used, but the way of plastic sealing and welding in the prior art will pollute the circuit substrate and other chips, and the chip is not allowed to be cleaned due to the particularity of the chip, so it is polluted by plastic sealing and welding. The product is basically unusable
In addition, under the premise of not changing the product performance, there are more and more demands for product miniaturization. In order to achieve the layout flexibility of the product, there are certain requirements for the size and connectivity of the product. The limitations of the requirements cannot be met
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[0055]After long-term research and time, the inventor of the present application found that the way of plastic sealing and welding in the prior art will pollute the circuit board and other chips, and the chip is not allowed to be cleaned due to the particularity of the chip, so the products polluted by plastic sealing and welding can basically not be cleaned. Normal use. In addition, under the premise of not changing the product performance, there are more and more demands for product miniaturization. In order to achieve the layout flexibility of the product, there are certain requirements for the size and connectivity of the product. limitations cannot meet the requirements. In view of this, an embodiment of the present application provides a method for soft-encapsulating an optocoupler. The circuit principle of the soft-encapsulated optocoupler is that a light-emitting device (such as a light-emitting diode) and a photosensitive device (such as a phototransistor) are assemb...
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The invention provides a soft package photoelectric coupler method and a soft package photoelectric coupler, and relates to the field of photoelectric couplers. The method comprises the following steps: manufacturing a tube shell as a supporting body for assembling and coupling two chips; bonding: bonding the two chips to corresponding preset positions of the tube shell by using a conductive adhesive; bonding, wherein the two chips are electrically connected through a gold wire welding process; coating light guide glue between the two chips to form a light transmission medium; and the chip and the bonding wires are wrapped by insulating glue to prevent light leakage. According to the technical application, assembly and coupling are carried out in the tube shell, the tube shell can be made of micro ceramics and is completed through a standard mixed assembly process, optical coupler fixation is realized by adopting insulating glue bonding, and electric connection is completed by gold wire welding, so that the maximum flexibility of layout is realized, and the situation that a circuit substrate and other chips are polluted by plastic optical coupler welding is effectively avoided.
Description
technical field [0001] The invention relates to the field of optocouplers, in particular to a soft-encapsulated optocoupler method and a soft-encapsulated optocoupler. Background technique [0002] Optocoupler, also known as photoelectric isolator or optocoupler, is a device that uses light as the coupling medium to achieve electrical isolation between input and output through the transmission of optical signals, and can transmit electrical signals between circuits or systems. Guarantee the isolation of the high-voltage end and the low-voltage end, and at the same time ensure the electrical insulation between these circuits or systems, which plays a role of safety guarantee. Optocouplers have the characteristics of small size, long service life, wide operating temperature range, strong anti-interference performance, no contact, and complete electrical isolation between input and output, so they are widely used in various electronic devices. Photocouplers can be used in circ...
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IPC IPC(8): H01L25/16H01L31/02H01L31/0203H01L33/52H01L33/62
CPCH01L25/167H01L31/0203H01L31/02005H01L33/62H01L33/52
Inventor 武磊
Owner 西安华芯微半导体有限公司