JP4779579B2 - Electronic component package - Google Patents

Description

  The present invention relates to an electronic component package used in various electronic devices.

  With the miniaturization of various electronic devices, there is a demand for electronic components in one package. In this one-package implementation, various electronic components such as a coil, a capacitor, a power amplifier, and a SAW package are mounted on a substrate and then molded in a resin state to form a one-package module.

  FIG. 8 is a perspective view of a conventional one package module. A capacitor 81, a coil 82, a power amplifier 83, and a SAW package 84 are mounted on a substrate 80. The substrate 80 is covered with a mold resin 85 to form a one package module.

  Thus, various electronic components can be handled in the same way as a semiconductor by making them into one package, and there is an advantage that it is convenient for manufacturers using the electronic components.

Patent Document 1 is known as prior art document information related to the invention of the present application.
JP 2004-304622 A

  However, there is a problem that the electronic component is easily damaged by the inflow pressure of the resin at the time of molding when forming the one package.

  That is, for example, in the case of the SAW package, the SAW element mounted on the component substrate is sealed with a component cover to prevent oxidation of the electrode due to moisture. In order to secure a space necessary for the SAW element to vibrate in the component cover, a concave portion is formed on the surface of the component cover facing the SAW element, and the outer periphery of the component cover is bonded to the component substrate. Has been. Since the thickness of the concave portion of the component cover is thinner than that of the outer peripheral portion, there is a problem that the component cover is damaged by the inflow pressure of the resin during the molding. In particular, in recent years when electronic components are required to be downsized, this tendency has become remarkable.

  Therefore, an object of the present invention is to reduce the breakage of an electronic component package.

In order to achieve this object, the invention according to claim 1 of the present invention connects a component board, a plurality of electronic component elements arranged on the component board at predetermined intervals, and the plurality of electronic component elements. A wiring cover and a component cover that forms a cavity on the component substrate so as to cover the plurality of electronic component elements and the wiring, and a partition wall is provided on the cover toward the component substrate so as to partition the cavity; Between the cavities partitioned by the partition wall, a communication path is provided in a non-wiring portion. Thus, even when the inflow pressure of the resin is concentrated in one cavity, the communication path can be Since the pressure is dispersed in the cavities, it is possible to reduce the deterioration of the characteristics of the electronic component due to the high pressure in the cavities.

According to a second aspect of the present invention, there is provided a component substrate, a plurality of electronic component elements disposed on the component substrate at predetermined intervals, wirings connecting the plurality of electronic component elements, and the plurality of electronic component elements. And a component cover provided on the component substrate so as to cover the wiring, and a partition wall is provided on the cover toward the component substrate so as to partition the plurality of electronic component elements, and between the cavities partitioned by the partition wall Therefore, even if the resin inflow pressure is concentrated in one cavity, the pressure is distributed to other cavities by this communication path. In addition, the present invention has the effect of reducing the deterioration of the characteristics of the electronic component due to the high pressure in the cavity.

In the present invention, a partition wall is provided in the component cover toward the component substrate so as to partition a plurality of electronic component elements, and a communication path is provided in a non-wiring portion between the cavities partitioned by the partition wall. Since it has a structure, it has the effect that the characteristic fall of an electronic component can be reduced .

  An electronic component package of the present invention will be described with reference to an embodiment and drawings. A description will be given using a SAW package as the electronic component package.

  FIG. 1 is a cross-sectional view of a module in which a SAW package according to an embodiment of the present invention is mounted on a mounting board to form a single package. In FIG. 1, SAW elements 2 are mounted on the surface of a component substrate 1 at a predetermined interval. The SAW element 2 is formed by forming an aluminum comb-shaped electrode (not shown) on the surface of a component substrate 1 made of a piezoelectric material typified by lithium tantalate, lithium niobate, crystal or the like. A component cover 3 made of silicon is provided on the surface of the component substrate 1 so as to cover the SAW element 2 while a slight cavity (not shown) is provided between the SAW element 2 and the SAW package 5. Forming. The component substrate 1 and the component cover 3 are joined through silicon oxide. A partition wall 4 is provided on the component cover 3 so as to partition the SAW element 2 toward the component substrate 1. The SAW package 5 is mounted on the mounting substrate 7 via the connection electrodes 6 exposed from the component cover 3, and the surface of the mounting substrate 7 on which the SAW package 5 is mounted is molded with the mold resin 8 to cover the SAW package 5. ing. At the time of molding, the mold resin 8 enters the gap between the component cover 3 and the mounting substrate 7, and the inflow pressure of the resin at this time is applied to the component cover 3. In the conventional electronic component package, the component cover may be damaged due to the inflow pressure. However, in the electronic component package of the present invention, since the partition wall 4 is provided, the inflow pressure can be resisted. As a result, breakage can be reduced.

  A communication path can be provided between the cavities partitioned by the partition wall 4. Thereby, even when the inflow pressure of the resin is concentrated in a certain cavity, the pressure can be dispersed to other cavities by this communication path. For example, in the case of the SAW element 2, it becomes difficult to vibrate due to the high pressure in the cavity, and as a result, there is a risk that the loss may increase. Has the effect of being able to

  This communication path can be provided in the component substrate 1 or in the partition wall 4. When provided on the component substrate 1, the non-wiring portion can be used as a communication path. That is, each SAW element 2 is connected via a wiring, which is formed on the component substrate 1. Then, a difference in height between the wiring and the mounting substrate 7 occurs. That is, since the non-wiring portion of the mounting substrate 7 is lowered by one step, this portion can be used as a communication path. Thereby, the trouble of providing a separate communication path can be saved.

  Here, a method of joining the component substrate 1 and the component cover 3 through silicon oxide will be described with reference to FIG. In order to join the component substrate 1 and the component cover 3, first, silicon oxide is formed on the surface of the component substrate 1. At that time, the mask shown in FIG. 2 can be used. The mask 21 is provided with an opening 22 at a location corresponding to the SAW element and the extraction electrode. Therefore, for example, a photosensitive resin is applied to the opening 22 and the photosensitive resin is cured by applying light, and then silicon oxide is formed on the non-photosensitive resin forming portion by sputtering or the like. Thereafter, silicon oxide can be formed on a predetermined portion of the component substrate 1 by removing the cured photosensitive resin. The silicon oxide is used to join the component cover 3 made of silicon. This bonding is based on covalent bonding of silicon atoms with oxygen atoms interposed therebetween, and can be directly bonded without heating by activating the interface between silicon oxide and the component cover.

  Next, the electronic component package of the present invention will be further described with reference to FIGS. 3 is an internal top view of the SAW package excluding the component cover 3, FIG. 4 is a top view of the component cover 3, and FIG. 5 is a top view of the component cover 3 in which connection electrodes 6 for connection to the mounting substrate 1 are formed. 6 is a cross-sectional view taken along the line BB of the component cover 3, and FIG. 7 is an electric circuit diagram corresponding to the top view of FIG.

  3 and 7, the SAW elements 2a, 2b, 2c, 2d, 2e, 2f, 2g, 2h, and 2i are mounted on the surface of the component substrate 1 made of a piezoelectric material at predetermined intervals. Are connected as shown in the circuit diagram shown in FIG.

  In FIG. 4, a concave portion is formed in the component cover 3, and the rear surface of the component cover 3 is disposed so as to cover the surface of the SAW package 5 in FIG. At this time, the concave portion is provided in the component cover 3 so as to correspond to the SAW element. That is, the SAW elements 2a and 2b are in the recess 31ab, the SAW elements 2c and 2d are in the recess 31cd, the SAW element 2e is in the recess 31e, the SAW elements 2f and 2g are in the recess 31fg, and the SAW elements 2h and 2i are in the recess 31hi. Correspondingly, the concave portion is fitted into each SAW element, and a space (cavity) necessary for the SAW element 2 to vibrate is formed.

  And this recessed part is connected to the adjacent recessed part in the communicating path. Here, the communication path can be provided in the partition wall 4 between the adjacent recesses 31, or a groove of the component substrate 1 can be formed to serve as the communication path. For example, in FIG. The surfaces of the mounting substrate 7 on which the elements 2 a, 2 b, 2 c, 2 d, 2 e, 2 f, 2 g, 2 h, 2 i, the wiring 33, the transmission terminal 34, and the reception terminal 35 are not formed may be all used as the communication path 32.

  As shown in FIGS. 5 and 6, after the component cover 4 is formed on the component substrate 1, the connection electrode 6 is formed for mounting on the mounting substrate 7. Since the component substrate 1 corresponding to the opening 22 of the mask 21 shown in FIG. 2 is in a state where the wiring 33 is exposed, a through hole is provided in the component cover 3 and the wiring 33 is plated with a conductive paste or the like. It is used to expose the surface of the component cover 3 to form the connection electrode 6.

  Each connection electrode 6 may be provided with an electrode pad as shown in FIG. That is, the electrode pad 54 corresponding to the transmission terminal 34, the electrode pad 55 corresponding to the reception terminal 35, the electrode pad 56 corresponding to the antenna terminal 36, and the other electrode pads 57 are GND. The SAW package 5 configured as described above is mounted on the mounting substrate 7.

  Next, the operation of the SAW package 5 will be described with reference to FIG. 3 and 7, the SAW elements 2a, 2b, 2c, 2d, 2e, 2f, 2g, 2h, and 2i are connected as shown in the circuit diagram of FIG. Here, the antenna terminal 36 is connected to an antenna (not shown), and a signal having a specific frequency is extracted from the signal received from the antenna via the SAW elements 2g and 2i and output to the reception terminal 35. On the other hand, the transmission signal is transmitted from the antenna via the antenna terminal 36 via the SAW elements 2a, 2c and 2e from the transmission terminal 34.

  As described above, the electronic component package according to the present invention has a configuration in which a partition wall is provided on the component cover toward the component substrate so as to partition a plurality of electronic component elements. It has the effect of being able to reduce the breakage of the cover.

  Although the SAW package has been described as an example of the electronic component package, the present invention is not limited to this.

  Further, even if a plurality of support columns are provided instead of the partition wall 4, the same effect can be obtained, and the partition wall 4 and the support columns can be used in combination. Here, when the support is used, the space between the support and the support and the space between the partition wall and the support serve as the communication path. However, it is also possible to separately provide the communication path in a portion where the wiring is not formed.

  The present invention is characterized in that a partition wall is provided on the component cover toward the component substrate so as to partition a plurality of electronic component elements, and is useful for an electronic component package having a cavity inside.

Sectional drawing of the module which mounted the SAW package in one embodiment of this invention on the mounting board | substrate, and was made into one package Mask top view The internal top view of the SAW package in one embodiment of the present invention Top view of parts cover Top view of component cover with connection electrodes Sectional view Electrical circuit diagram of SAW package in one embodiment of the present invention Perspective view of a conventional one package module

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Component substrate 2, 2a, 2b, 2c, 2d, 2e, 2f, 2g, 2h, 2i SAW element 3 Component cover 4 Partition wall 5 SAW package 6 Connection electrode 7 Mounting substrate 8 Mold resin 21 Mask 22 Opening 31ab, 31cd , 31e, 31fg, 31hi Recess 32 Communication path 33 Wiring 34 Transmission terminal 35 Reception terminal 36 Antenna terminal 54, 55, 56, 57 Electrode pad

Claims (2)

Component board, a plurality of electronic component elements arranged at predetermined intervals on the component board, wiring connecting the plurality of electronic component elements, and the component board so as to cover the plurality of electronic component elements and the wiring A component cover that forms a cavity on the cover, and a partition wall is provided on the cover toward the component substrate so as to partition the cavity, and the wiring is not formed between the cavities partitioned by the partition wall. Electronic component package with a passage . Component board, a plurality of electronic component elements arranged at predetermined intervals on the component board, wiring connecting the plurality of electronic component elements, and the component board so as to cover the plurality of electronic component elements and the wiring And a partition wall is provided on the cover toward the component substrate so as to partition the plurality of electronic component elements, and the wiring is not formed between the cavities partitioned by the partition wall. Electronic component package with a passage.

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