Method of sintering fuse and circuit structure thereof

Abstract

The application provides a sintering fuse method and a circuit structure thereof, and the method comprises the following steps: providing a charge-discharge module, a direct current power supply and a chip to be processed, the charge-discharge module comprises a capacitor and a resistor connected in series, and the chip to be processed has a preset number of fuses to be sintered; connecting the direct current power supply to the charge-discharge module to charge the capacitor, and disconnecting the connection between the direct current power supply and the charge-discharge module after the capacitor is fully charged; connecting the charge-discharge module to both ends of the selected fuse to be sintered to discharge the capacitor, and disconnecting the discharge circuit after the selected fuse to be sintered is sintered. The sintering fuse method can meet the sintering requirements of various sintering products, does not cause damage to the power supply and the device, and effectively improves the production yield and efficiency. The sintering fuse circuit structure can effectively improve the production yield and efficiency, and reduce the production cost.

Description

Technical Field

[0001] This invention belongs to the field of integrated circuit manufacturing and relates to a method for sintering fuses and their circuit structure. Background Technology

[0002] Conventional voltage regulation chips initially have multiple sets of resistors of specific specifications interconnected by fuses. However, in actual applications, depending on the specific application, manufacturers need to process these resistors to obtain a chip product that meets the requirements. A common processing method is to sinter the fuses between some of the resistors while preserving the integrity of the fuses between the remaining resistors. This causes the resistors with sintered fuses to lose their function of regulating voltage or capacitance, and the chip will then use the remaining resistors to achieve the device function of regulating voltage or capacitance.

[0003] Currently, please refer to Figure 1 The diagram shows a circuit structure diagram of a sintered fuse in the prior art. An independent power supply 11 is connected to a regulating resistor 12 and the two ends of the fuse 14 on the chip to be processed 13 to form a closed circuit. The independent power supply 11 provides a fixed output voltage to the closed circuit, and the regulating resistor 13 is used to regulate the current passing through the fuse 14, thereby sintering the fuse 14 between specific resistors on the chip to be processed 13. This method requires an independent power supply 14 and can only meet the sintering process requirements of some voltage-regulated products. With the upgrading of production technology, the types of chips to be sintered are increasing, and their complexity is gradually increasing. The requirements for sintering current and sintering time differ for various products, resulting in existing methods either failing to burn the fuse, damaging the independent power supply, or even burning out the components of the chip containing the fuse, seriously affecting production efficiency and yield.

[0004] Therefore, how to provide a method and circuit structure for sintering fuses to meet the sintering requirements of various sintering products without damaging the power supply and devices, and effectively improve production yield and efficiency, has become an important technical problem that urgently needs to be solved by those skilled in the art.

[0005] It should be noted that the above introduction to the technical background is only for the purpose of providing a clear and complete explanation of the technical solutions of this application and facilitating understanding by those skilled in the art. It should not be assumed that these technical solutions are known to those skilled in the art simply because they have been described in the background section of this application. Summary of the Invention

[0006] In view of the shortcomings of the prior art described above, the purpose of this invention is to provide a method for sintering fuses and its circuit structure, which solves the problem that the conventional method of sintering fuses in the prior art results in insufficient current, causing the fuse to burn out, or excessive current, damaging the power supply or devices, and cannot meet the sintering requirements of various sintering products.

[0007] To achieve the above and other related objectives, the present invention provides a method for sintering a fuse, comprising the following steps:

[0008] A charging / discharging module, a DC power supply, and a chip to be processed are provided. The charging / discharging module includes a capacitor and a resistor connected in series, and the chip to be processed has a preset number of fuses to be sintered.

[0009] Connect the DC power supply to the charging and discharging module to charge the capacitor, and disconnect the DC power supply from the charging and discharging module after the capacitor is fully charged.

[0010] The charging and discharging module is connected to both ends of the selected fuse to be sintered to discharge the capacitor. After the selected fuse to be sintered, the discharge circuit is disconnected.

[0011] Optionally, the negative terminal of the DC power supply is grounded, and the chip to be processed is grounded.

[0012] Optionally, the capacitor may include a fixed capacitor or a variable capacitor.

[0013] Optionally, the resistor may be a fixed resistor or a variable resistor.

[0014] Optionally, the voltage range of the DC power supply output is 2V to 20V.

[0015] Optionally, the chip to be processed includes a chip for adjusting voltage or a chip for adjusting capacitance.

[0016] Optionally, the material of the fuse to be sintered includes aluminum or an aluminum-antimony alloy.

[0017] Optionally, the sintering current range of the fuse to be sintered is 500 mA to 1000 mA.

[0018] Optionally, the sintering time of the fuse to be sintered is in the range of 1 millisecond to 3 milliseconds.

[0019] The present invention also provides a circuit structure for sintering a fuse, including a charging and discharging module and a DC power supply. The charging and discharging module includes a capacitor and a resistor connected in series. The circuit structure includes a first operating state and a second operating state. In the first operating state, the DC power supply is connected to the charging and discharging module to charge the capacitor. After the capacitor is fully charged, the connection between the DC power supply and the charging and discharging module is disconnected. In the second operating state, the charging and discharging module is used to connect to both ends of a selected fuse to be sintered so that the capacitor discharges and the selected fuse to be sintered is sintered.

[0020] As described above, the method for sintering a fuse according to the present invention includes the following steps: providing a charging / discharging module, a DC power supply, and a chip to be processed; the charging / discharging module includes a capacitor and a resistor connected in series, and the chip to be processed has a preset number of fuses to be sintered; connecting the DC power supply to the charging / discharging module to charge the capacitor; disconnecting the DC power supply from the charging / discharging module after the capacitor is fully charged; connecting the charging / discharging module to the two ends of a selected fuse to be sintered to discharge the capacitor; and disconnecting the discharge circuit after the fuse to be sintered. The method for sintering a fuse according to the present invention can meet the sintering requirements of various sintered products without damaging the power supply and devices, effectively improving production yield and efficiency. The circuit structure of the sintered fuse of the present invention can effectively improve production yield and efficiency and reduce production costs. Attached Figure Description

[0021] Figure 1 The diagram shows a circuit structure diagram of a method for sintering fuses in the prior art.

[0022] Figure 2 The diagram shows the steps of the sintering fuse method of the present invention.

[0023] Figure 3 The diagram shown is a schematic diagram of the circuit structure obtained after performing step S1 in the method for sintering a fuse according to the present invention.

[0024] Figure 4 The diagram shows a schematic of a chip used for voltage regulation.

[0025] Figure 5 Displayed as Figure 4 A magnified view of part I.

[0026] Figure 6 The diagram shown is a schematic diagram of the circuit structure obtained after performing step S2 in the method for sintering a fuse according to the present invention.

[0027] Figure 7 The diagram shown is a schematic diagram of the circuit structure obtained after performing step S3 in the method for sintering a fuse according to the present invention.

[0028] Component designation explanation

[0029] 11. Independent power supply

[0030] 12 Adjusting the resistance

[0031] 13 Chips to be processed

[0032] 14 Fuse pending processing

[0033] 21 Charge / Discharge Module

[0034] 211 capacitor

[0035] 212 resistor

[0036] 22 DC power supply

[0037] 23 Chips to be processed

[0038] 24 Fuse awaiting sintering

[0039] 25 Fixed resistor

[0040] 26. Fuse

[0041] Steps S1 to S3 Detailed Implementation

[0042] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0043] Please see Figures 2 to 7 It should be noted that the illustrations provided in this embodiment are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0044] Example 1

[0045] This embodiment provides a method for sintering fuses. Please refer to [link / reference]. Figure 2 The flowchart shown is a step-by-step diagram of the method for sintering a fuse according to this embodiment, including the following steps:

[0046] S1: Provides a charging / discharging module, a DC power supply, and a chip to be processed. The charging / discharging module includes a capacitor and a resistor connected in series, and the chip to be processed has a preset number of fuses to be sintered.

[0047] S2: Connect the DC power supply to the charging and discharging module to charge the capacitor, and disconnect the DC power supply from the charging and discharging module after the capacitor is fully charged;

[0048] S3: Connect the charging and discharging module to both ends of the selected fuse to be sintered to discharge the capacitor. After the selected fuse to be sintered, the discharge circuit is disconnected.

[0049] First, please refer to Figure 3 In step S1, a charging / discharging module 21, a DC power supply 22, and a chip to be processed 23 are provided. The charging / discharging module 21 includes a capacitor 211 and a resistor 212 connected in series. The chip to be processed 23 has a preset number of fuses 24 to be sintered.

[0050] As an example, the negative terminal of the DC power supply 22 is grounded, and the chip to be processed 3 is grounded.

[0051] As an example, the capacitor 211 may be a fixed capacitor or a variable capacitor, and the type and specifications of the capacitor 211 may be reasonably selected according to the actual processing requirements.

[0052] As an example, the resistor 212 may be a fixed resistor or a variable resistor, and the type and specifications of the capacitor 211 may be reasonably selected according to the actual processing requirements.

[0053] As an example, the voltage range of the DC power supply 21 is 2V to 20V. In this embodiment, the voltage output of the DC power supply 21 includes 5V or 12V. The voltage output of the DC power supply 21 can also be reasonably selected according to the actual situation.

[0054] As an example, the chip to be processed 23 includes a chip for regulating voltage or a chip for regulating capacitance; please refer to [link to relevant documentation]. Figure 4 The diagram shows the structure of the chip 23 to be processed. The chip 23 is provided with multiple sets of fixed resistors 26 of specific specifications interconnected by fuses 25. Please refer to [link / reference]. Figure 5 Displayed as Figure 4 The enlarged view of part I shows that when the chip to be processed 3 is used in a specific application scenario, the fuse 25 connected in the middle of some of the fixed resistors 26 on the chip to be processed 23 needs to be sintered to disconnect it in order to adjust the actual resistance value of the chip to be processed 23 and meet the actual functional requirements of the chip. The fuse connecting the fixed resistors 26 in this part is the fuse 24 to be sintered.

[0055] As an example, the material of the fuse to be sintered 24 includes aluminum or aluminum-antimony alloy. Since aluminum alloy has low density, good heat dissipation, and strong compressive strength, it can fully meet the requirements of high integration, thinness, miniaturization, impact resistance, electromagnetic shielding, and heat dissipation of the product. Therefore, aluminum-antimony alloy is preferred to be used to make the fuse to be sintered 24. Of course, the fuse to be sintered 24 is not limited to the above materials, and may also include other materials that meet the performance requirements such as low melting point.

[0056] Please see Figure 6 In step S2, the DC power supply 22 is connected to the charging and discharging module 21 to charge the capacitor 211. After the capacitor 211 is fully charged, the connection between the DC power supply 22 and the charging and discharging module 21 is disconnected.

[0057] Specifically, since the capacitor 24 is a device that stores energy in the form of an electric field, it can release the stored energy into the circuit when needed after storing a certain amount of energy. When the DC power supply 22 is connected to the charging and discharging module 21, the charge on the metal plate connected to the positive terminal of the power supply in the capacitor 211 structure will move to the metal plate connected to the negative terminal of the power supply under the action of the electric field force. This causes the metal plate connected to the positive terminal of the power supply to lose its charge and become positively charged, while the metal plate connected to the negative terminal of the power supply to gain a charge and become negatively charged. Current flows in this closed circuit, and the capacitor 211 begins to charge. In the circuit, the movement of charge forms a current. Due to the repulsion of like charges, the current is largest at the beginning of the charge movement and then gradually decreases. Therefore, the... The charge on capacitor 211 is initially zero at the start of charge movement. As the charge moves, the charge gradually increases, and the voltage between the two metal plates gradually increases. As the charging process continues, when the voltage between the two metal plates increases to be equal to the voltage of the DC power supply 22, capacitor 211 is fully charged, the current decreases to zero, and no current flows in the circuit. The charging process of capacitor 211 is complete. At this point, no current flows through capacitor 211. Therefore, in a DC circuit, capacitor 211 can be considered equivalent to an open circuit or an infinitely large resistance. The voltage across capacitor 211 cannot change abruptly.

[0058] Please see Figure 7 In step S3, the charging and discharging module 21 is connected to both ends of the selected fuse 24 to be sintered so that the capacitor 21 is discharged. After the fuse 24 to be sintered is sintered, the discharge circuit is disconnected.

[0059] Specifically, the discharge process of the capacitor 211 is the sintering process of the fuse 26 to be sintered. During the discharge process of the capacitor 21, since the discharge circuit is a passive closed circuit, the charge on the negatively charged metal plate in the structure of the capacitor 211 will move to the positively charged metal plate under the action of the electric field force, so that the positive and negative charges are neutralized, the capacitor 211 begins to discharge, and the voltage between the two metal plates in the structure of the capacitor 211 will gradually decrease to zero.

[0060] As an example, the sintering current range of the fuse 24 to be sintered is 500 mA to 1000 mA.

[0061] As an example, the sintering time range of the fuse 24 to be sintered is 1 millisecond to 3 milliseconds.

[0062] Specifically, since a capacitor has a time constant τ that describes its charging and discharging speed, and τ is the product of its resistance and capacitance values, the charging and discharging speed of the charging and discharging module 21 is determined by the inherent properties of the capacitor 211 and the resistance value of the resistor 22 in the structure of the charging and discharging module 21. That is, by controlling the capacitance value of the capacitor 211 and the resistance value of the resistor 212, the charging and discharging speed and time of the charging and discharging module 21 can be controlled. The smaller the capacitance value of the capacitor 211 or the resistance value of the resistor 212, the smaller the time constant of the capacitor 211, and the faster the charging and discharging speed of the capacitor 211. That is, the smaller the time constant of the charging and discharging module 21, the faster the charging and discharging speed of the charging and discharging module, and vice versa. Because the capacitor 211 has the aforementioned special electrical properties, when the fuse is sintered using the method described in this embodiment, the sintering process of the fuse to be sintered can be precisely controlled by selecting appropriate specifications for the capacitor and the resistor. This can meet the sintering requirements of various sintered products, and will not result in the fuse not being sintered due to insufficient current or the sintering speed being too slow, thus affecting production efficiency. Furthermore, it will not result in the power supply being damaged due to excessive current or even directly damaging the chip to be processed, thus reducing product yield and increasing production costs.

[0063] The sintering fuse method of this embodiment can meet the sintering requirements of various sintering products, without damaging the power supply and devices, effectively improving production yield and efficiency, and reducing production costs.

[0064] Example 2

[0065] This embodiment provides a circuit structure for a sintered fuse. Please refer to [further details]. Figure 3 The circuit structure includes a charging / discharging module 21 and a DC power supply 22. The charging / discharging module 21 includes a capacitor 211 and a resistor 212 connected in series. The circuit structure includes a first operating state and a second operating state. Please refer to [further details omitted]. Figure 6 In the first usage state, the DC power supply 22 is connected to the charging / discharging module 21 to charge the capacitor 211. Once the capacitor 211 is fully charged, the connection between the DC power supply 22 and the charging / discharging module 21 is disconnected. Please refer to [further details omitted]. Figure 6 In the second usage state, the charging and discharging module 21 is used to connect to both ends of the selected fuse 24 to be sintered so that the capacitor 211 discharges and sinters the selected fuse 24 to be sintered.

[0066] As an example, the negative terminal of the DC power supply 22 is grounded, and the chip to be processed 3 is grounded.

[0067] As an example, the capacitor 211 may be a fixed capacitor or a variable capacitor.

[0068] As an example, the resistor 212 includes a fixed resistor or a variable resistor.

[0069] As an example, the voltage range of the DC power supply 21 is 2V to 20V. In this embodiment, the voltage output of the DC power supply 21 includes 5V or 12V.

[0070] As an example, the chip to be processed 23 includes a chip for adjusting voltage or a chip for adjusting capacitance.

[0071] As an example, the material of the fuse 24 to be sintered includes aluminum or an aluminum-antimony alloy.

[0072] As an example, the sintering current range of the fuse 24 to be sintered is 500 mA to 1000 mA.

[0073] As an example, the sintering time range of the fuse 24 to be sintered is 1 millisecond to 3 milliseconds.

[0074] Specifically, in the first usage state, when the DC power supply 22 is connected to the charging and discharging module 21, the charge on the metal plate connected to the positive terminal of the power supply in the capacitor 211 structure will move to the metal plate connected to the negative terminal of the power supply under the action of the electric field force. This causes the metal plate connected to the positive terminal of the power supply to lose its charge and become positively charged, while the metal plate connected to the negative terminal of the power supply to gain a charge and become negatively charged. Current flows in this closed circuit, and the capacitor 211 begins to charge. In the charging circuit of capacitor 211, the movement of charge forms a current. Due to the repulsion of like charges, the current is at its maximum at the beginning of the charge movement and then gradually decreases. Therefore, the charge on capacitor 211 is at its minimum of zero at the beginning of the charge movement. During the charge movement, the charge gradually increases, and the voltage between the two metal plates gradually increases. As the charging process continues, when the voltage between the two metal plates increases to be equal to the voltage of the DC power supply 22, capacitor 211 is fully charged, the current decreases to zero, and no current flows in the circuit. The charging process of capacitor 211 is complete. At this time, no current flows through capacitor 211. Therefore, in the DC circuit, capacitor 211 can be equivalent to an open circuit or an infinitely large resistance. The voltage on capacitor 211 cannot change abruptly.

[0075] Specifically, in the second usage state, the charging / discharging module 21 is connected to both ends of the selected fuse 24 to be sintered, causing the capacitor 211 to discharge. The discharge process of the capacitor 211 is the sintering process of the fuse 26 to be sintered. During the discharge process of the capacitor 21, since the discharge circuit is a passive closed circuit, the charge on the negatively charged metal plate in the structure of the capacitor 211 will move to the positively charged metal plate under the action of the electric field force, so that the positive and negative charges are neutralized, the capacitor 211 begins to discharge, and the voltage between the two metal plates in the structure of the capacitor 211 will gradually decrease to zero.

[0076] Specifically, since a capacitor has a time constant τ that describes its charging and discharging speed, and τ is the product of its resistance and capacitance values, the charging and discharging speed of the charging and discharging module 21 is determined by the inherent properties of the capacitor 211 and the resistance value of the resistor 22 in the structure of the charging and discharging module 21. That is, by controlling the capacitance value of the capacitor 211 and the resistance value of the resistor 212, the charging and discharging speed and time of the charging and discharging module 21 can be controlled. The smaller the capacitance value of the capacitor 211 or the resistance value of the resistor 212, the smaller the time constant of the capacitor 211, and the faster the charging and discharging speed of the capacitor 211. That is, the smaller the time constant of the charging and discharging module 21, the faster the charging and discharging speed of the charging and discharging module, and vice versa.

[0077] The circuit structure of the sintered fuse in this embodiment can sinter fuses to be sintered in various sintered products without damaging the power supply and devices during the sintering process, which can effectively improve production yield and efficiency and reduce production costs.

[0078] Example 3

[0079] This embodiment applies the sintering fuse method of Embodiment 1 and the circuit structure of the sintering fuse of Embodiment 2 to the sintering of the fuse to be sintered on the chip to be processed in order to obtain the target chip product.

[0080] First, capacitor 211, resistor 212, DC power supply 22 and chip to be processed 23 are combined into a structure as follows: Figure 3 The circuit structure shown includes a capacitor 211 and a resistor 212 connected in series, which serve as a charging and discharging module 21. The chip to be processed 23 has multiple sets of fixed resistors 25 connected by fuses 26, some of which are fuses 24 to be sintered. The specifications of the capacitor 211, resistor 212, and DC power supply 22 are selected according to the actual specifications of the chip to be processed 23 (such as the material and thickness of the fuse 24 to be sintered), to ensure that the fuse 24 to be sintered can be burned out within a preset time during the actual sintering process without affecting production efficiency.

[0081] Switch the circuit structure to as follows Figure 6 The first usage state shown is that the DC power supply 22 is connected to the charging and discharging module 21, and the capacitor 211 in the charging and discharging module 21 is charged through the DC power supply 22. After the capacitor 211 is fully charged, the connection between the DC power supply 22 and the charging and discharging module 21 in the circuit structure is disconnected.

[0082] Switch the circuit structure to as follows Figure 7 The second usage state shown is that the charge-discharge module 21 is connected to both ends of one of the fuses 24 to be sintered on the chip 23 to be sintered, and the sintering of the fuse 24 to be sintered is completed by discharging the capacitor 211 in the charge-discharge module 21.

[0083] After the aforementioned fuse 24 is sintered, the charging / discharging module 21 can be used to sinter the next fuse, or a fully charged standby charging / discharging module can be used to sinter the next fuse while the charging / discharging module 21 is charged and ready for use. The appropriate method can be chosen based on the actual situation during production. This cycle continues until all fuses are sintered, thus completing the processing of the chip 23 and obtaining the target chip product.

[0084] In summary, the sintering fuse method of the present invention includes the following steps: providing a charging / discharging module, a DC power supply, and a chip to be processed; the charging / discharging module includes a capacitor and a resistor connected in series, and the chip to be processed has a preset number of fuses to be sintered; connecting the DC power supply to the charging / discharging module to charge the capacitor; disconnecting the DC power supply from the charging / discharging module after the capacitor is fully charged; connecting the charging / discharging module to the two ends of a selected fuse to be sintered to discharge the capacitor; and disconnecting the discharge circuit after the fuse to be sintered. The sintering fuse method and circuit structure of the present invention can meet the sintering requirements of various sintered products without damaging the power supply and devices, effectively improving production yield and efficiency. Therefore, the present invention effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0085] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A method for sintering a fuse, characterized in that, Includes the following steps: The system provides a charge / discharge module, a backup charge / discharge module, a DC power supply, and a chip to be processed. The charge / discharge module consists of only a capacitor and a resistor connected in series, and the chip to be processed has a preset number of fuses to be sintered. Connect the DC power supply to the charging and discharging module to charge the capacitor, and disconnect the DC power supply from the charging and discharging module after the capacitor is fully charged. The charging and discharging module is connected to both ends of the selected fuse to be sintered to discharge the capacitor. After the selected fuse to be sintered is sintered, the discharge circuit is disconnected. The next fuse to be sintered is sintered using the backup charge / discharge module, and the charge / discharge module is charged until it is fully charged and ready for use.

2. The method for sintering a fuse according to claim 1, characterized in that, The negative terminal of the DC power supply is grounded, and the chip to be processed is grounded.

3. The method for sintering a fuse according to claim 1, characterized in that: The capacitor may be a fixed capacitor or a variable capacitor.

4. The method for sintering a fuse according to claim 1, characterized in that: The resistor may be a fixed resistor or a variable resistor.

5. The method for sintering a fuse according to claim 1, characterized in that: The DC power supply outputs a voltage range of 2V to 20V.

6. The method for sintering a fuse according to claim 1, characterized in that: The chip to be processed includes a chip for adjusting voltage or a chip for adjusting capacitance.

7. The method for sintering a fuse according to claim 1, characterized in that: The material of the fuse to be sintered includes aluminum or an aluminum-antimony alloy.

8. The method for sintering a fuse according to claim 1, characterized in that: The sintering current range of the fuse to be sintered is 500 mA to 1000 mA.

9. The method for sintering a fuse according to claim 1, characterized in that: The sintering time range of the fuse to be sintered is 1 millisecond to 3 milliseconds.

10. A circuit structure for a sintered fuse, used in the method of sintering fuse according to any one of claims 1-9, characterized in that: The circuit includes a charging / discharging module and a DC power supply. The charging / discharging module includes a capacitor and a resistor connected in series. The circuit structure includes a first operating state and a second operating state. In the first operating state, the DC power supply is connected to the charging / discharging module to charge the capacitor. After the capacitor is fully charged, the connection between the DC power supply and the charging / discharging module is disconnected. In the second operating state, the charging / discharging module is used to connect to both ends of a selected fuse to be sintered so that the capacitor discharges and the selected fuse to be sintered is sintered.

Images