CN101179898B - Complementary mirror-image type concealed plane resistor structure - Google Patents
Complementary mirror-image type concealed plane resistor structure Download PDFInfo
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- CN101179898B CN101179898B CN2006101435400A CN200610143540A CN101179898B CN 101179898 B CN101179898 B CN 101179898B CN 2006101435400 A CN2006101435400 A CN 2006101435400A CN 200610143540 A CN200610143540 A CN 200610143540A CN 101179898 B CN101179898 B CN 101179898B
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Abstract
The invention discloses a complementary mirror image type inner plane resistance framework that has an inner plane resistance design with a complementary hollow structure for a grounding surface or an electrode surface, so as to minimize the parasitic capacitance, which leads to increasing the applying frequency effectively. Besides, since other signal lines pass beneath the inner plane resistance sometimes, complete lack of segmentation results in severe disturbance or cross talk, thus the complementary hollow on the grounding surface, the electrode surface or a power layer of the inner plane resistance nearby is designed into a mesh shape, thereby reducing the disturbance or cross talk. Meanwhile, the complete resistance structure has the best high-voltage electric prosperities in the circuit.
Description
Technical field
The present invention relates to the built-in planar resistor element design in a kind of Mulitilayer circuit board, and particularly relate to a kind of complementary mirror-image type concealed plane resistor structure, the ground plane or the electrode surface that are adjacent to concealed plane resistor are done complementary engraved structure (hollow structure) design.
Background technology
High frequency, wideband and three viewpoints of miniaturization almost become the demand of high-tech industries such as wireless telecommunications, digital computer, portable type electronic product and appliance communication and market maximum.Dwindling with hidden element under the trend of circuit area, it is general that the electric capacity and the resistive element of quantity are the passive components that all circuit designers wish to replace in the mode of imbedding (Embedded) surface adhering (Surface MountedTechnique, " SMT ") most at most in circuit.Resistive element is replaced with various structures or material, and incorporate many different technologies into and after imbedding, tend to because produce the effect of many parasitic antennas (Parasitic Components) between the resistive element that buries and metal ground plane or the electrode, and present different electrical characteristics.And when frequency was more and more higher, the influence of these ghost effects was also increasing, and when applied numerical digit or analogous circuit, when its design more and more tended to the direction of high frequency and wideband, element was just more and more important in the application of high frequency.
The concealed plane resistor of prior art and the framework of ground connection please refer to Figure 1A, in framework 100 with concealed plane resistor and ground plane, concealed plane resistor 110 is between two electrodes 120 and 122, ground plane 130 then is positioned at the below of concealed plane resistor 110 as shown in the figure, wherein then is dielectric layer 140.Do not consider the design of ground plane 130 in this framework 100, it is very huge that yet different media and dielectric property can influence parasitic capacitance (capacitor C as shown), for example the thickness H1 of concealed plane resistor 110 and H2, electrode 120 and 122 thickness T 1 or the thickness H3 of medium.
110 of the resistance with concealed plane like this are applicable to low-frequency channel.For example in the concealed plane resistor analog architectures with Figure 1B, comprise concealed plane resistor 110 and two electrodes 120,122, and middle dielectric layer 140, if to have dielectric constant (Dielectric Constant) is that 17 high dielectric material (HiDK17) is an example, under the concealed plane resistor design of 400 ohm (ohm), relatively the frequency response simulation drawing of analog architectures and the actual resistance that measures is then shown in Fig. 1 C.In Fig. 1 C, label 151 is the frequency response chart of analog architectures, and label 153 is the frequency response chart of the resistance of actual measurement.From then on figure can understand, and when frequency was high more, the ground plane of concealed plane resistor below made resistance impedance when high frequency descend, and causes on the frequency applications to reach requirement.
At United States Patent (USP) the 5th, 270, No. 493, name is called in the patent case of " Printed Circuit Board HavingElectromagnetic Wave Shielding Layer And Self-contained Printed Resistor ", disclose a kind of framework of concealed plane resistor, please refer to shown in Figure 2.The printed circuit board (PCB) that this patent disclosed comprises concealed plane resistor 210, and an electromagnetic shielding layer (Electro-magnetic wave shield) 220, to cover the caused Electromagnetic Interference of transmission line.But, the influence that but can't protect the mutual coupling between concealed plane resistor to produce.
Summary of the invention
The invention provides a kind of complementary mirror-image type concealed plane resistor structure, comprising: concealed plane resistor, be positioned at first plane, two ends connect first lead and second lead respectively; First ground plane is positioned at second plane; And the dielectric layer of at least a material, between above-mentioned first plane and above-mentioned second plane, wherein on above-mentioned first ground plane, has engraved structure with the mirror position place of above-mentioned concealed plane resistor, wherein the shape of above-mentioned engraved structure and area are corresponding to the shape and the area design of above-mentioned concealed plane resistor, wherein said complementary mirror-image type concealed plane resistor structure also comprises second ground plane, above-mentioned second ground plane is positioned at the 3rd plane, and has another engraved structure at the mirror position place of above-mentioned second ground plane and above-mentioned concealed plane resistor, wherein the shape of above-mentioned another engraved structure and area are corresponding to the shape and the area design of above-mentioned concealed plane resistor, and above-mentioned first plane is between above-mentioned second plane and above-mentioned the 3rd plane.
The invention provides a kind of complementary mirror-image type concealed plane resistor structure, the ground plane or the electrode that are adjacent to concealed plane resistor are formed engraved structure, can reduce the parasitic capacitance size, and can improve the frequency range of application effectively, and the dielectric loss between the metal level of concealed plane resistor and vicinity can be improved also.
In one embodiment, above-mentioned engraved structure is the full engraved structure with the similar of above-mentioned concealed plane resistor.
In another embodiment, the ground plane or the electrode formation of concealed plane resistor correspondence position had the structure of grid (mesh), can reduce the size of parasitic capacitance, and can shield the interference that the lower layer signal circuit is produced effectively, improve the frequency range of using effectively, and the dielectric loss between concealed plane resistor and the adjacent conductive layer can be improved also.
In utilization embodiment, the present invention proposes a kind of complementary mirror-image type concealed plane resistor structure, comprises concealed plane resistor, ground plane or electrode layer or bus plane and dielectric layer.Above-mentioned concealed plane resistor is positioned at first plane, and two ends connect first lead and second lead respectively.And ground plane or electrode layer or bus plane are positioned at second plane.And dielectric layer is between above-mentioned first plane and above-mentioned second plane.Mirror position with above-mentioned concealed plane resistor on above-mentioned ground plane or electrode layer or bus plane partly has engraved structure, and wherein above-mentioned engraved structure concealed plane resistor shape was adjusted according to needing in the design.
In utilization embodiment, the present invention proposes a kind of complementary mirror-image type concealed plane resistor structure, comprises concealed plane resistor, first electrode and second electrode, ground plane or electrode layer or bus plane and dielectric layer.Above-mentioned concealed plane resistor is positioned at first plane.And first electrode and second electrode are positioned on above-mentioned first plane, and wherein, above-mentioned first electrode is in order to connecting the above-mentioned concealed plane resistor and first lead, and above-mentioned second electrode is in order to connect the above-mentioned concealed plane resistor and second lead.Ground plane or electrode layer or bus plane are positioned at second plane.Dielectric layer is between above-mentioned first plane and above-mentioned second plane, wherein partly have engraved structure with the mirror position of above-mentioned concealed plane resistor on above-mentioned ground plane or electrode layer or bus plane, wherein above-mentioned engraved structure shape concealed plane resistor can be adjusted according to needing in the design.
In utilization embodiment, the present invention proposes a kind of complementary mirror-image type concealed plane resistor structure, comprises concealed plane resistor, first electrode and second electrode, ground plane or electrode layer or bus plane and dielectric layer.Above-mentioned concealed plane resistor is positioned at first plane.First electrode and second electrode are positioned on above-mentioned first plane, wherein, above-mentioned first electrode is in order to connect the above-mentioned concealed plane resistor and first guide hole (Via Hole), this concealed plane resistor can be connected with the circuit element of other plane layers, and above-mentioned second electrode is in order to connect the above-mentioned concealed plane resistor and second guide hole (Via Hole), uses this concealed plane resistor is connected with the circuit element of other plane layers.Ground plane or electrode layer or bus plane are positioned at second plane.Dielectric layer is between above-mentioned first plane and above-mentioned second plane, wherein partly have engraved structure with the mirror position of above-mentioned concealed plane resistor on above-mentioned ground plane or electrode layer or bus plane, wherein above-mentioned engraved structure shape can be adjusted according to needing in the design.
Because having other holding wires sometimes, passes through concealed plane resistor, if do not have to separate fully and can cause serious disturbance or cross-talk (Cross Talk) phenomenon yet, if therefore the complementary hollow out of ground plane of resistance is designed to mesh shape to reduce interference or cross-talk, can make whole electric resistance structure have best high frequency electrical characteristic this moment in circuit.
At above-mentioned complementary mirror-image type concealed plane resistor ground connection framework, in one embodiment, above-mentioned engraved structure is identical or similar with the planform of above-mentioned concealed plane resistor, and the full engraved structure that area can be identical or different in fact.
At above-mentioned complementary mirror-image type concealed plane resistor structure, in one embodiment, above-mentioned engraved structure has the fenestral fabric of a plurality of holes.
At above-mentioned complementary mirror-image type concealed plane resistor structure, in one embodiment, above-mentioned engraved structure has the hole of a plurality of elongate in shape.
At above-mentioned complementary mirror-image type concealed plane resistor structure, in one embodiment, the above-mentioned dielectric layer that is positioned at first plane and above-mentioned second plane is one deck or comprise the material of other kinds not only.
At above-mentioned complementary mirror-image type concealed plane resistor structure, in one embodiment, first electrode of above-mentioned connection concealed plane resistor is a ground connection.
At above-mentioned complementary mirror-image type concealed plane resistor structure, in one embodiment, first electrode of above-mentioned connection concealed plane resistor is a power supply, and second electrode is a ground connection.
At above-mentioned complementary mirror-image type concealed plane resistor structure, in one embodiment, above-mentioned first lead and second lead are microstrip line (Micro-strip Line) structure.
At above-mentioned complementary mirror-image type concealed plane resistor structure, in one embodiment, above-mentioned first lead and second lead are the line of floating (Floating Line) structure.
At above-mentioned complementary mirror-image type concealed plane resistor structure, in one embodiment, above-mentioned first guide hole and second guide hole are the formed via of mechanicalness drilling machine (PTH) structure.
At above-mentioned complementary mirror-image type concealed plane resistor structure, in one embodiment, above-mentioned first guide hole and second guide hole are the formed laser hole of laser hole burning machine (Laser via) structure.
For above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, preferred embodiment cited below particularly, and in conjunction with the accompanying drawings, be described in detail below.
Description of drawings
Figure 1A is the traditional concealed plane resistor and the framework of ground connection.
Figure 1B is traditional concealed plane resistor analog architectures.
Fig. 1 C is according to traditional concealed plane resistor and ground connection framework, relatively the frequency response simulation drawing of analog architectures and the actual resistance that measures.
Fig. 2 is the printed circuit type structure that tradition has concealed plane resistor.
Fig. 3 A is the complementary mirror-image type concealed plane resistor ground connection framework generalized section in order to the explanation preferred embodiment of the present invention.
Fig. 3 B then is the side perspective schematic diagram of the complementary mirror-image type concealed plane resistor ground connection framework of the preferred embodiment of the present invention.
Fig. 3 C then is the side perspective schematic diagram of the complementary mirror-image type concealed plane resistor ground connection framework of the preferred embodiment of the present invention
Fig. 4 A is the complementary mirror-image type concealed plane resistor ground connection framework generalized section in order to the explanation preferred embodiment of the present invention.
Fig. 4 B then is the side perspective schematic diagram.
The impedance magnitude that Fig. 5 A explanation ground plane changes for concealed plane resistor changes and frequency relation figure.
The impedance magnitude (getting the db value) that Fig. 5 B explanation ground plane changes for concealed plane resistor changes and frequency relation figure.
Fig. 6 is the complementary mirror-image type concealed plane resistor structure generalized section in order to the explanation preferred embodiment of the present invention.
Fig. 7 is the complementary mirror-image type concealed plane resistor structure generalized section in order to another preferred embodiment of explanation the present invention.
The simple symbol explanation
100: the framework of concealed plane resistor and ground plane
110: concealed plane resistor
120 and 122: electrode
130: ground plane
140: dielectric layer
210: concealed plane resistor
220: electromagnetic shielding layer (Electro-magnetic wave shield)
310: concealed plane resistor
320 and 324: electrode
322 and 326: transmission line (Transmission Line) or guide hole (Via Hole)
330: conductive layer or ground plane or bus plane
332: engraved structure
340: dielectric layer
410: concealed plane resistor
420 and 424: electrode
422 and 426: transmission line
430: ground plane
432: engraved structure
440: dielectric layer
460: transmission line
610: concealed plane resistor
620 and 624: electrode
622 and 626: transmission line (Transmission Line)
630: built-in capacitance structure
632: engraved structure
625,635: dielectric layer
632: electric pole plate
634: lower electrode plate
710: concealed plane resistor
720,722: band line (Strip Line)
730,740: ground plane
750,760: dielectric layer
732,742: engraved structure
Embodiment
The design of concealed plane resistor tends to because the resistive element and the conductive layer that bury, for example metal ground plane or electrode layer or bus plane, between produce the effect of many parasitic antennas (Parasitic Components), and present different electrical characteristics.And when frequency was more and more higher, the influence of these ghost effects was also increasing, for example can pass through because of other holding wires, can not cause serious disturbance or cross-talk (Cross Talk) phenomenon if having to separate fully.The present invention makes its applying frequency improve then by improving structure Design mode between concealed plane resistor element and ground plane or electrode layer or the bus plane, is more suitable for the application circuit in high frequency.
In order to improve above-mentioned characteristic, the structure that just must design innovation is to reach the application of high frequency.In traditional concealed plane resistor design, because electrode all is to bury in circuit substrate (Substrate), and electrode contact often all is to receive transmission line or guide hole.And general transmission line structure for example is microstrip line (Micro-strip line) structure, so inevitably can cause parasitic capacitance between the ground plane of microstrip line and below or the electrode layer.
The present invention proposes a kind of complementary mirror-image type concealed plane resistor structure, the ground plane or the electrode layer of contiguous concealed plane resistor are done complementary hollow out, can reduce the parasitic capacitance size, and can improve the frequency range of application effectively, and dielectric loss can be improved also between concealed plane resistor and metal ground plane or electrode layer or the bus plane.
Select among the embodiment at another, the present invention proposes a kind of complementary mirror-image type concealed plane resistor structure, the ground plane of contiguous concealed plane resistor or electrode layer or bus plane formed have the structure of grid (mesh), can reduce the size of parasitic capacitance, and can shield the interference that the lower layer signal circuit is produced effectively, improve the frequency range of using effectively, and dielectric loss can be improved also between concealed plane resistor and metal ground plane or electrode layer or the bus plane.
At a specific embodiment of the present invention, can be with reference to shown in Fig. 3 A and the 3B.Fig. 3 A is that Fig. 3 B then is the side perspective schematic diagram in order to the complementary mirror-image type concealed plane resistor structure generalized section of the explanation preferred embodiment of the present invention.In this complementary mirror-image type concealed plane resistor structure, comprise concealed plane resistor 310 between two electrodes 320 and 324, and contiguous conductive layer, for example be ground plane or electrode layer or bus plane or the like, with the ground plane example explanation at this.330 belows that are positioned at concealed plane resistor 310 as shown in the figure of this ground plane, between wherein then be dielectric layer 340.And electrode 320 and 324 is connected respectively to transmission line (Transmission Line) 322 and 326, and these transmission lines 322 and 326 for example are microstrip line (Micro-strip line) structures.
Between two electrodes 320 and 324 in concealed plane resistor 310 parts with one deck, has the part that length and width are X and Y as shown in the figure, on the ground plane 330 of correspondence, hollow out engraved structure 332 via complementary mirror image mode, the size of this engraved structure 332 can equal the shape that length and width are X and Y in fact in an embodiment, and just the area of engraved structure 332 is equivalent in fact between two electrodes 320 and 324 at the area with concealed plane resistor 310 parts of one deck.Yet, in the embodiment of practice, this engraved structure 332 also can be slightly larger than or less than between two electrodes 320 and 324 in concealed plane resistor 310 parts with one deck, also belong to the exercisable scope of the present invention, in a preferred embodiment, the area of the area of engraved structure 332 and concealed plane resistor 310 parts is about between 0.5 times to 1.5 times.In addition, engraved structure 332 in shape can with the similar or different shape of concealed plane resistor 310 parts.Concealed plane resistor is done complementary hollow out with the ground plane 330 of concealed plane resistor 310, can reduce the parasitic capacitance size, and can improve the frequency range of application effectively, and the dielectric loss between concealed plane resistor and the metal ground plane can be improved also.
In the present invention's selection embodiment, the size of this engraved structure 332 also can be considered the area of two electrodes 320 and 324, just the area of this engraved structure 332 can be designed as in fact greater than, be equal to or less than between two electrodes 320 and 324 in the summation of adding the area of two electrodes 320 and 324 with the area of concealed plane resistor 310 parts of one deck.In the embodiment of practice, the area of engraved structure 332 is added two electrodes 320 with concealed plane resistor 310 areas and is compared with the area summation of 324 parts, is about between 0.5 times to 1.5 times.
At another specific embodiment of the present invention, can be with reference to shown in Fig. 3 C.Shown in Fig. 3 C, complementary mirror-image type concealed plane resistor structure, comprise concealed plane resistor 310, first electrode 320 and second electrode 324, ground plane or electrode layer or bus plane 330, with dielectric layer 340.Above-mentioned concealed plane resistor is positioned at first plane.First electrode and second electrode are positioned on above-mentioned first plane, wherein, above-mentioned first electrode is in order to connect the above-mentioned concealed plane resistor and first guide hole 322, this concealed plane resistor can be connected with the circuit element of other plane layers, and above-mentioned second electrode is in order to connect the above-mentioned concealed plane resistor and second guide hole 326, uses this concealed plane resistor is connected with the circuit element of other plane layers.Ground plane or electrode layer or bus plane are positioned at second plane.Dielectric layer is between above-mentioned first plane and above-mentioned second plane, wherein partly have engraved structure with the mirror position of above-mentioned concealed plane resistor on above-mentioned ground plane or electrode layer or bus plane, wherein above-mentioned engraved structure shape can be adjusted according to needing in the design.
At above-mentioned complementary mirror-image type concealed plane resistor structure, in one embodiment, above-mentioned first guide hole and second guide hole can be the formed via of mechanicalness drilling machine (PTH) structure.
Or at above-mentioned complementary mirror-image type concealed plane resistor structure, in one embodiment, above-mentioned first guide hole and second guide hole are the formed laser hole of laser hole burning machine (Laser via) structure.
At above-mentioned complementary mirror-image type concealed plane resistor structure, in one embodiment, first electrode of above-mentioned connection concealed plane resistor is through first guide hole, 322 ground connection.
At above-mentioned complementary mirror-image type concealed plane resistor structure, in one embodiment, first electrode of above-mentioned connection concealed plane resistor is by first guide hole, 322 ground connection, and second electrode is for being connected to other layers by second guide hole 326.
In another specific embodiment of the present invention, can be with reference to shown in Fig. 4 A and the 4B.Fig. 4 A is that Fig. 4 B then is the side perspective schematic diagram in order to the complementary mirror-image type concealed plane resistor ground connection framework generalized section of the explanation preferred embodiment of the present invention.In this complementary mirror-image type concealed plane resistor ground connection framework, comprise concealed plane resistor 410 between two electrodes 420 and 424, ground plane 430 then is positioned at the below of concealed plane resistor 410 as shown in the figure, between wherein then be dielectric layer 440.Then be to have another transmission line 460 below ground plane 430.And electrode 420 and 424 is connected respectively to transmission line (Transmission Line) 422 and 426, and these transmission lines 422 and 426 for example are microstrip line (Micro-strip line) structures.Shown in Fig. 4 A, this concealed plane resistor 410 except and ground plane 430 between produce parasitic capacitance (as figure indicated 442), influence outside the utilization scope of high frequency, also can be subjected in the interference of the transmission line 460 of other one deck and influence (as shown in the figure 444).
Between two electrodes 420 and 424 in concealed plane resistor 410 parts with one deck, has the part that length and width are X and Y as shown in the figure, on the ground plane 430 of correspondence, hollow out the have grid structure 432 of (mesh) via complementary mirror image mode, the size of this grid (mesh) structure 432 can equal the size that length and width are X and Y in fact, and is made up of the hole of several marshallings.Select among the embodiment at another, this network 432 can be formed with set order or any arrangement by a plurality of holes, and shape, size and unrestricted as long as there are a plurality of holes, for example can be a plurality of holes of strip.
And these network 432 whole sizes also can greater than, equal or less than between two electrodes 420 and 424 in concealed plane resistor 410 parts with one deck, also belong to the exercisable scope of the present invention, in a preferred embodiment, the area of the area of network 432 and concealed plane resistor 410 parts is about between 0.5 times to 1.5 times.The ground plane 430 of concealed plane resistor 410 is done the hollow out of network, can reduce the size of parasitic capacitance, and can shield the interference that the lower layer signal circuit is produced effectively, the dielectric loss that frequency range of raising application, and concealed plane resistor effectively and metal connect between the face also can be improved.
In selection embodiment of the present invention, the size of this network 432 also can be considered the area of two electrodes 420 and 424, just the entire area of this network 432 can design greater than, equal or less than between two electrodes 420 and 424 at the area of adding two electrodes 420 and 424 with the area of concealed plane resistor 410 parts of one deck.In the embodiment of practice, the area of network 432 is added two electrodes 420 with concealed plane resistor 410 areas and is compared with the area summation of 424 parts, is about between 0.5 times to 1.5 times.
Structure according to the above embodiment of the present invention is carried out sunykatuib analysis, is 30 * 30 squares of Mill (mil at concealed plane resistor for example
2), its thickness is about 1.8 Mills, and its resistance value is every square unit 1M ohm (ohm).And the dielectric layer material between concealed plane resistor and the ground plane is the HiDk17 dielectric material of special tool high-dielectric coefficient newly developed, and thickness is about 8 Mills.Please refer to Fig. 5 A, mainly is that the impedance magnitude that the explanation ground plane changes for concealed plane resistor changes and frequency relation figure.In traditional framework, the degree that resistance value descends when frequency increases is shown in label 510.The complementary mirror-image type concealed plane resistor ground connection framework that the present invention carried is done complementary engraved structure with the ground plane of concealed plane resistor, and its resistance and frequency response diagram are then shown in label 520.In addition, the complementary mirror-image type concealed plane resistor ground connection framework that the present invention carried forms the ground plane of concealed plane resistor and has the structure of grid (mesh), and its resistance illustrates then shown in label 525 with frequency response.When using for high frequency, complementary mirror-image type concealed plane resistor ground connection framework proposed by the invention, existing really significantly improvement serves as preferred the ground plane of concealed plane resistor is done complementary engraved structure wherein.And mainly be that the explanation ground plane changes impedance magnitude (getting db value) variation and the frequency relation figure for concealed plane resistor at other Fig. 5 B.
Complementary mirror-image type concealed plane resistor ground connection framework proposed by the invention, after the whole hollow outs of ground plane counterpart below the concealed plane resistor, if under the design of 400 ohm (ohm), the about 2GHz of the natural frequency of vibration (from 5GHz to 7GHz) can be improved, or about 20 ohm (from the 400ohm to 420ohm) of resistance value can be improved.And if the ground plane counterpart below concealed plane resistor adopts mesh design, under the design of 400 ohm (ohm), can improve the about 200MHz of the natural frequency of vibration, or can improve resistance value, but be not clearly.
Another specific embodiment of the present invention can be with reference to shown in Figure 6.Fig. 6 is the complementary mirror-image type concealed plane resistor structure generalized section in order to the explanation preferred embodiment of the present invention.In this complementary mirror-image type concealed plane resistor structure, comprise concealed plane resistor 610 between two electrodes 620 and 624, and contiguous built-in capacitance structure 630.This built-in capacitance structure 630 comprises for example electric pole plate 632, lower electrode plate 634 and the dielectric layer 635 that is sandwiched in the centre.Electric pole plate 632 then is positioned at the below of concealed plane resistor 610 as shown in the figure, between wherein then be another dielectric layer 625.And electrode 620 and 624 is connected respectively to transmission line (Transmission Line) 622 and 626, and these transmission lines 622 and 626 for example are microstrip line (Micro-strip line) structures.
Between two electrodes 620 and 624 in concealed plane resistor 610 parts with one deck, has the part that length and width are X and Y as shown in the figure, on the electric pole plate 632 of correspondence, hollow out engraved structure 633 via complementary mirror image mode, the size of this engraved structure 633 can equal the shape that length and width are X and Y in fact in one embodiment, and just the area of engraved structure 633 is equivalent in fact between two electrodes 620 and 624 at the area with concealed plane resistor 610 parts of one deck.Yet, in the embodiment of practice, this engraved structure 633 also can be slightly larger than or less than between two electrodes 620 and 624 in concealed plane resistor 610 parts with one deck, also belong to the exercisable scope of the present invention.In addition, engraved structure 633 in shape can with the similar or different shape of concealed plane resistor 610 parts.The electric pole plate 632 of contiguous concealed plane resistor 610 is done complementary hollow out, can reduce the parasitic capacitance size, and can improve the frequency range of application effectively, and concealed plane resistor and metal connect and have dielectric loss also can be improved between the face.
In selection embodiment of the present invention, the size of this engraved structure 633 also can be considered the area of two electrodes 620 and 624, just the area of this engraved structure 632 can be designed as in fact greater than, be equal to or less than between two electrodes 620 and 624 at the area of adding two electrodes 620 and 624 with the area of concealed plane resistor 610 parts of one deck.
In selection embodiment of the present invention, also can be to the electric pole plate 632 and lower electrode plate 634 of built-in capacitance structure 630, dig out engraved structure 633 and 637 via complementary mirror image mode respectively at electric pole plate 632 and lower electrode plate 634, also the parasitic capacitance size can be reduced, and the frequency range of application can be improved effectively.Another specific embodiment of the present invention can be with reference to shown in Figure 7.Fig. 7 is the complementary mirror-image type concealed plane resistor structure generalized section in order to the explanation preferred embodiment of the present invention.In this complementary mirror-image type concealed plane resistor structure, comprise concealed plane resistor 710 between two ground planes 730 and 740, and concealed plane resistor 710 is connected in band line 720 and 722 respectively, this is so-called band line (Strip Line) structure.General band line partly has contact at built-in metal, but is one with contact and the transmission line of metal among this embodiment, thus the specific bigger contact that do not draw, therefore also but the electrode of Fig. 6 between wherein.It for example is the design of microwave circuit that the band line structure is usually used in, so in this embodiment, ground plane 730 and 740 all had engraved structure about concealed plane resistor 710 needed.This complementary mirror-image type concealed plane resistor structure comprises for example descending ground plane 730, go up ground plane 740 and being sandwiched in middle dielectric layer 750 and 760 respectively.And ground plane 730 has engraved structure 732 and 742 respectively with last ground plane 740 down.
In addition, engraved structure 732 with 742 in shape can the shape similar or different to concealed plane resistor 710.The engraved structure 732 and 742 of contiguous concealed plane resistor 710 is done complementary hollow out, can reduce the parasitic capacitance size, and can improve the frequency range of application effectively, and concealed plane resistor and metal connect and have dielectric loss also can be improved between the face.
Though the present invention discloses as above with preferred embodiment; yet it is not in order to qualification the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; when can doing a little change and modification, thus protection scope of the present invention with claims the person of being defined be as the criterion.
Claims (7)
1. complementary mirror-image type concealed plane resistor structure comprises:
Concealed plane resistor is positioned at first plane, and two ends connect first lead and second lead respectively;
First ground plane is positioned at second plane; And
The dielectric layer of at least a material, between above-mentioned first plane and above-mentioned second plane,
Wherein have engraved structure with the mirror position place of above-mentioned concealed plane resistor on above-mentioned first ground plane, wherein the shape of above-mentioned engraved structure and area be corresponding to the shape and the area design of above-mentioned concealed plane resistor,
Wherein said complementary mirror-image type concealed plane resistor structure also comprises second ground plane, above-mentioned second ground plane is positioned at the 3rd plane, and has another engraved structure at the mirror position place of above-mentioned second ground plane and above-mentioned concealed plane resistor, wherein the shape of above-mentioned another engraved structure and area are corresponding to the shape and the area design of above-mentioned concealed plane resistor, and above-mentioned first plane is between above-mentioned second plane and above-mentioned the 3rd plane.
2. complementary mirror-image type concealed plane resistor structure as claimed in claim 1, wherein above-mentioned engraved structure are the hole of full hollow out, and its area is between 0.5 times to 1.5 times of above-mentioned concealed plane resistor area.
3. complementary mirror-image type concealed plane resistor structure as claimed in claim 1, wherein above-mentioned engraved structure has the fenestral fabric of a plurality of holes.
4. complementary mirror-image type concealed plane resistor structure as claimed in claim 1, wherein above-mentioned engraved structure has the hole of a plurality of elongate in shape.
5. complementary mirror-image type concealed plane resistor structure as claimed in claim 1, wherein above-mentioned first lead and second lead are microstrip line (Micro-strip Line) structure.
6. complementary mirror-image type concealed plane resistor structure as claimed in claim 1, wherein above-mentioned first lead and second lead are band line (Strip Line) structure.
7. complementary mirror-image type concealed plane resistor structure as claimed in claim 1, wherein above-mentioned first lead and second lead are the line of floating (Floating Line) structure.
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| CN2006101435400A CN101179898B (en) | 2006-11-10 | 2006-11-10 | Complementary mirror-image type concealed plane resistor structure |
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| CN2006101435400A CN101179898B (en) | 2006-11-10 | 2006-11-10 | Complementary mirror-image type concealed plane resistor structure |
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|---|---|---|---|---|
| US6765298B2 (en) * | 2001-12-08 | 2004-07-20 | National Semiconductor Corporation | Substrate pads with reduced impedance mismatch and methods to fabricate substrate pads |
| CN2785312Y (en) * | 2004-12-13 | 2006-05-31 | 威盛电子股份有限公司 | Assembling structure of embedded passive components |
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| CN101179898A (en) | 2008-05-14 |
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