[0032] The omnidirectionally connected metal capacitor disclosed in the present invention draws on the form of the plug-finger capacitor in the prior art, and first constitutes a unit module of a metal capacitor, which includes an odd-numbered layer and an even-numbered layer of upper and lower plug-finger capacitors. image 3 Is a schematic diagram of the odd-numbered layer capacitor of the present invention, Figure 4 It is a schematic diagram of the even-numbered layer capacitor of the present invention. The odd-numbered layer and the even-numbered layer respectively include an upper portion and a lower portion, the upper portion is T-shaped and the lower portion is U-shaped.
[0033] The upper and lower parts of the odd-numbered layers respectively include a horizontal wiring 311 and a plurality of interdigitating fingers 312, and the plurality of interdigitating fingers are staggered up and down, and between the interdigitated fingers, it also includes a continuous serpentine wiring 322, as shown in the figure The slanted shaded part of the slanted line, the serpentine trace is located between the inserting fingers, and is equidistant from the inserting finger, and is bent and connected at the end of the inserting finger, and the bent connecting part is parallel to the horizontal trace 311, and the serpentine trace The two ends of are respectively connected to a vertical line 321;
[0034] The upper and lower parts of the even-numbered layer respectively include a horizontal connection trace 411 and a plurality of interdigitating fingers 412, and the plurality of interdigitating fingers are staggered up and down. Between the interdigitated fingers, a continuous serpentine trace 422 is also included. The curved wiring is located between the inserting fingers, at the same distance from the inserting fingers, and is bent and connected at the end of the inserting finger. The bent connecting part is parallel to the horizontal connecting wiring 411, and the two ends of the serpentine wiring are connected to a vertical To line 421;
[0035] The multiple fingers of the even-numbered layer and the multiple fingers of the odd-numbered layer corresponding to the top and bottom are offset from each other by one unit. image 3 , 4 It can be seen that the fingers 412 and 432 of the even-numbered layers and the fingers 312 and 332 of the odd-numbered layers are offset by one unit to the right. Similarly, the serpentine traces 422 of the even-numbered layers and the serpentine traces 322 of the upper and lower corresponding odd-numbered layers are offset from each other by one unit. The so-called unit is relatively speaking, image 3 , Figure 4 , Image 6 In each layer, there are 8 vertical wires (including the fingers 312 and 332, the serpentine wires 322 and the vertical wires 321). Figure 5 In each layer, there are 11 longitudinal wires in total, and one unit is the distance from one longitudinal wire to another.
[0036] The vertical line 321 of the serpentine trace 322 of the odd-numbered layer is equal to the lengths 312 and 332 of the inserting fingers, and is the same as the distance between the upper and lower horizontal traces 311, 331, that is, the length between the upper The horizontal trace 331 is between the upper edge and the lower edge of the lower horizontal trace 331; the length of the upper horizontal trace 411 of the even-numbered layer is equal to the distance between the two vertical lines 421 of the serpentine trace and the even number The length of the horizontal trace 431 at the lower part of the layer is equal to the distance between the vertical lines 421 at both ends of the serpentine trace.
[0037] The upper and lower horizontal traces 311, 331, 411, 431 of the odd-numbered and even-numbered layers and the vertical connections 321, 421 of the serpentine traces are respectively provided with a plurality of through holes 30, 40, and the through holes 30 of the odd-numbered layers The through holes 40 of the even-numbered layers correspond to each other, so that the fingers and the serpentine traces of the odd-numbered and even-numbered layers can be connected together.
[0038] The upper and lower fingers of the odd and even layers are connected to the same electrode, and the serpentine trace is connected to the other electrode, that is, the serpentine traces of the odd and even layers (shaded by the diagonal lines) and the odd and even layers The upper and lower fingers (blank parts) are connected to two different electrodes respectively.
[0039] The omnidirectionally connected capacitors composed of the above-mentioned metal capacitor unit modules are used, and the omnidirectionally connected capacitors are arranged in a matrix of M*N columns composed of a plurality of metal capacitors.
[0040] For the serpentine trace, the left and right metal capacitors in the same row in the odd-numbered layer share the vertical lines 311 and 331 of the serpentine trace, and the upper and lower metal capacitors in the same column in the odd-numbered layer are connected to each other through the vertical line 321 of the serpentine trace. Connected; the left and right metal capacitors in the same row in the even-numbered layer share a vertical connection, and the vertical connections of the upper and lower metal capacitors in the same column in the even-numbered layer are disconnected from each other.
[0041] For the finger connection, the left and right metal capacitors in the same row in the even-numbered layer share the upper and lower horizontal traces 411 and 431; the left and right metal capacitors in the same row in the odd-numbered layer are disconnected from each other; the even-numbered layer and the odd-numbered layer Between the upper and lower metal capacitors in the same column, the lower horizontal trace 331 of the upper row of metal capacitors serves as the upper horizontal trace 411 of the lower row of metal capacitors, that is, the U-shaped bottom 331 of the upper row of fingers serves as the next row of fingers The horizontal connection traces 411.
[0042] In other words, the left and right metal capacitors in the same row in the odd-numbered layer share the vertical connection of the serpentine trace, and the upper and lower metal capacitors in the same column are connected to each other by the vertical connection of the serpentine trace; the left and right metal capacitors in the same row in the even-numbered layer Common upper and lower horizontal traces; between the upper and lower metal capacitors in the same column, the lower horizontal trace of the metal capacitor in the upper row is used as the upper horizontal trace of the metal capacitor in the next row.
[0043] It should be pointed out that in the bottom metal capacitor connection mode, the plug-finger connection is separated from the top and bottom, but in most layout designs, the top layer will use thicker and thicker metal to form the power network, usually the bottom metal line Tens of times the width, these top-level metal power networks will be directly punched into the horizontal traces of the finger connections through the through holes, so that the finger connections can be connected in the vertical direction. From another perspective, because this connection is in parallel, the resistance of the metal capacitor part can also be greatly reduced, and the resistance is inversely proportional to the speed according to the speed, so as to ensure the feasibility of this metal capacitor in terms of speed.
[0044] The present invention also discloses a wiring method for a metal capacitor. The metal capacitor includes an odd-numbered layer and an even-numbered layer. The upper and lower layers of the finger-inserting capacitor include an upper and a lower part, respectively. The upper and lower parts of the odd-numbered layer respectively include lateral wiring. And a plurality of interdigitating fingers, and the plurality of interdigitating fingers are staggered up and down, and a continuous serpentine wiring is arranged between the interdigitating fingers. The serpentine wiring is located between the interdigitating fingers and is equidistant from the interdigitating fingers. The ends of the inserting fingers are bent and connected, and the bent and connected parts are parallel to the horizontal line, and the two ends of the serpentine line are respectively connected to a vertical line;
[0045] The upper and lower parts of the even-numbered layers respectively include a horizontal connection trace and a plurality of interdigitating fingers, and the plurality of interdigitating fingers are staggered up and down. A continuous serpentine trace is arranged between the interdigitated fingers, and the serpentine trace is located at Between the inserting fingers, the distance between the inserting fingers is equal, and the ends of the inserting fingers are bent and connected, the bent connecting part is parallel to the horizontal line, and the two ends of the serpentine line are connected to a vertical line respectively;
[0046] The multiple fingers of the even-numbered layer and the multiple fingers of the odd-numbered layer corresponding to the top and bottom are offset from each other by one unit, and the serpentine traces of the even-numbered layer and the serpentine traces of the odd-numbered layer corresponding to the top and bottom are offset from each other by one unit.
[0047] The present invention also includes omnidirectionally connected capacitors formed by the above-mentioned metal capacitor wiring method, and omnidirectionally connected capacitor wiring methods, and omnidirectionally connected capacitors using the above metal capacitor as a unit module.
[0048] From the point of view of the same layer, since the serpentine trace and the finger trace are always interleaved, and the serpentine trace and the finger trace are always connected to the opposite polarity, parasitic capacitance can be generated;
[0049] From the perspective of the upper and lower layers, the serpentine trace is always adjacent to the finger line, and the serpentine trace and the finger trace are always connected to the opposite polarity, so parasitic capacitance can be generated between the upper and lower metals. Observing a certain trace arbitrarily, you will find that the left, right and adjacent upper and lower layers of the same layer are the metal wires of the other electrode, even in the bent part, so the parasitic capacitance of the metal is utilized to the greatest extent , More capacitance is produced in the same area.
[0050] This capacitor layout design can be stretched horizontally or vertically according to actual needs. Figure 5 It is a schematic diagram of the transverse stretching of the odd-even layer capacitor of the present invention, Image 6 It is a schematic diagram of the longitudinal stretching of the odd-even layer capacitor of the present invention, thereby increasing the flexibility of the capacitor. Figure 5 , 6 In, represented by X image 3 , 4 The through holes 30 and 40 in the middle are represented by straight lines image 3 , 4 All traces.
[0051] This capacitor layout (layout) can be regarded as one end of the outer ring wrapped connection line and the other end of the inner ring serpentine wiring connection, such as Figure 7 , 8. The inner serpentine connection is divided into odd and even layers. To put it vividly, if the connection of the odd layer is regarded as a sine wave with a phase of 0, the connection of the even layer is 1/4 period away from the connection of the odd layer. Sine wave. The outer ring connection and the inner ring connection are respectively connected to different potentials. If you observe carefully, you will find that most of the four three-dimensional directions (up, down, left, and right) of the connection are connected to another point except for the edges of a few serpentine traces. The wires of the bits are adjacent, including the corners, thereby maximizing the metal contact area between different potentials, that is, increasing the metal capacitance.
[0052] In addition, when multiple capacitors are placed close to the edge in a rectangular array, the outer rings (odd-numbered layers) of each capacitor are naturally connected to form a tight power grid. At the same time, the even-numbered layers on the left and right sides can also form another The grid connection of electric potential, thus realizes the goal of "omnidirectional".
[0053] The reusable design of the present invention greatly saves layout design time and effectively increases the metal capacitance per unit area. When multiple capacitors are placed close together, no additional work is required to form a power grid.
