A method, device and electronic equipment for quickly finding an ideal burning value of an electric fuse

Abstract

The application provides a method, device and electronic equipment for quickly finding ideal burning value of an electric fuse. The method comprises the following steps: setting a center ideal value V_ideal, obtaining a first measurement gear L_meas1 and a measurement value V_meas1 of the first measurement gear; calculating a first deviation value V_diff1 between the measurement value V_meas1 of the first measurement gear and the center ideal value V_ideal; calculating a first gear deviation value L_diff1 according to the first deviation value V_diff1 and a step value V_offset; calculating a second measurement gear L_meas2 according to the first measurement gear L_meas1 and the first gear deviation value L_diff1, obtaining a measurement value V_meas2 of the second measurement gear; calculating a second deviation value V_diff2 between the measurement value V_meas2 of the second measurement gear and the center ideal value V_ideal; judging whether the product of the first deviation value V_diff1 and the second deviation value V_diff2 is less than 0 and whether the first gear deviation value L_diff1 is equal to 1; updating the center gear L_ideal to a statistical table and setting the gear with the largest number of times as a starting gear for next measurement.

Description

Technical Field

[0001] This invention relates to the field of integrated circuit design, and more specifically, to a method, apparatus, and electronic device for rapidly finding the ideal programming value for an electrical fuse. Background Technology

[0002] To achieve high precision in target parameters during chip design, the method of electronic fuse programming is often used to eliminate inherent systematic errors in the manufacturing process. By burning out different combinations of fuses within the chip, systematic and random errors in the manufacturing process can be eliminated, thereby making the target parameters of each chip more consistent.

[0003] Compared to traditional methods, which often employ a traversal search, searching from smallest to largest value to find the chip with the smallest deviation from the center ideal value V_ideal, and then performing chip fuse programming, this process is relatively time-consuming. For example, if a chip has 5 fuses, there are 2 to the power of 5 combinations, and traversing these 32 combinations takes a lot of testing time, thus increasing the testing cost. Summary of the Invention

[0004] The purpose of this invention is to provide a method, apparatus, and electronic device for quickly finding the ideal burning value of an electric fuse.

[0005] The present invention aims to solve the problems of high cost and long time consumption in the existing process of finding the ideal burning value of the electric fuse.

[0006] Compared with the prior art, the technical solution of the present invention and its beneficial effects are as follows:

[0007] In a first aspect of this disclosure, a method for rapidly finding the ideal burn-in value of an electric fuse is provided, comprising: setting a center ideal value V_ideal, obtaining a first measurement range L_meas1 and a measured value V_meas1 of the first measurement range; calculating a first deviation value V_diff1 between the measured value V_meas1 of the first measurement range and the center ideal value V_ideal; calculating a first range deviation value L_diff1 based on the first deviation value V_diff1 and a step value V_offset; calculating a second measurement range L_meas2 based on the first measurement range L_meas1 and the first range deviation value L_diff1, and obtaining a measured value V_meas2 of the second measurement range; calculating a second deviation value V_diff2 between the measured value V_meas2 of the second measurement range and the center ideal value V_ideal; and determining whether the first deviation value V_diff1 and the second deviation value V_decorate are related. The system checks whether the product of the first deviation value V_diff1 and the second deviation value V_diff2 is less than 0, and whether the first gear deviation value L_diff1 is equal to 1. If the product of the first deviation value V_diff1 and the second deviation value V_diff2 is less than 0, and the first gear deviation value L_diff1 is equal to 1, the system compares the absolute values ​​of the first deviation value V_diff1 and the second deviation value V_diff2. If the absolute value of the first deviation value V_diff1 is less than the absolute value of the second deviation value V_diff2, the system sets the center gear L_ideal as the first measurement gear L_meas1. If the absolute value of the first deviation value V_diff1 is greater than the absolute value of the second deviation value V_diff2, the system sets the center gear L_ideal as the second measurement gear L_meas2. The system updates the center gear L_ideal to the statistics table and sets the gear with the most occurrences as the starting gear for the next measurement.

[0008] In a second aspect of this disclosure, an apparatus for rapidly finding the ideal burn-in value of an electric fuse is provided, comprising: a calculation module configured to calculate a first deviation value V_diff1 between a measured value V_meas1 at a first measurement setting and the center ideal value V_ideal; the calculation module is further configured to calculate a first setting deviation value L_diff1 based on the first deviation value V_diff1 and a step value V_offset; the calculation module is further configured to calculate a second measurement setting L_meas2 based on the first measurement setting L_meas1 and the first setting deviation value L_diff1, and obtain a measured value V_meas2 at the second measurement setting; the calculation module is further configured to calculate a second deviation value V_diff2 between the measured value V_meas2 at the second measurement setting and the center ideal value V_ideal; and a judgment module configured to judge the first deviation value V_diff1 and the second deviation value V_diff1. The module is configured to determine whether the product of the first deviation value V_diff1 and the second deviation value V_diff2 is less than 0, and whether the first gear deviation value L_diff1 is equal to 1; the determination module is further configured to determine the magnitude of the first deviation value V_diff1 and the second deviation value V_diff2 if the product of the first deviation value V_diff1 and the second deviation value V_diff2 is less than 0, and the first gear deviation value L_diff1 is equal to 1; the execution module is configured to set the center gear L_ideal as the first measurement gear L_meas1 if the first deviation value V_diff1 is greater than the second deviation value V_diff2; if the first deviation value V_diff1 is less than the second deviation value V_diff2, set the center gear L_ideal as the second measurement gear L_meas2; the execution module is further configured to update the center gear L_ideal to the statistics table, and set the gear with the most occurrences as the starting gear for the next measurement.

[0009] In a third aspect of this disclosure, an electronic device includes: a memory and a processor; wherein the memory is configured to store one or more computer instructions, wherein the one or more computer instructions are executed by the processor to implement the method according to a first aspect of this disclosure.

[0010] The beneficial effects of this invention are as follows:

[0011] The method of the present invention continuously updates the step value and the initial measurement range value based on each measurement value, and corrects the chip fuse range deviation in real time. If the actual measurement value is greater than V_ideal, the measurement range is adaptively reduced; if the actual measurement value is less than V_ideal, the measurement range is increased.

[0012] This invention proposes a fast adaptive fuse position approximation and positioning method, which enables the rapid finding of the position value closest to the ideal center value during the testing process, thereby reducing testing time, achieving high on-chip target parameter accuracy, and maintaining high programming efficiency, thus reducing testing time and saving costs. Attached Figure Description

[0013] Figure 1 This is a first schematic diagram of a method for quickly finding the ideal burning value of an electric fuse according to an embodiment of the present invention.

[0014] Figure 2 This is a second schematic diagram of a method for quickly finding the ideal burning value of an electric fuse according to an embodiment of the present invention.

[0015] Figure 3 This is a schematic diagram of a device for quickly finding the ideal burning value of an electric fuse according to an embodiment of the present invention. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to represent selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0017] In the description of this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0018] Reference Figure 1 and Figure 2 As shown, in a first aspect of this disclosure, a method for rapidly finding the ideal programming value for an electric fuse includes:

[0019] Set a center ideal value V_ideal, obtain the first measurement gear L_meas1 and the measured value V_meas1 of the first measurement gear; calculate the first deviation value V_diff1 between the measured value V_meas1 of the first measurement gear and the center ideal value V_ideal; calculate the first gear deviation value L_diff1 based on the first deviation value V_diff1 and the step value V_offset; calculate the second measurement gear L_meas2 based on the first measurement gear L_meas1 and the first gear deviation value L_diff1, and obtain the measured value V_meas2 of the second measurement gear; calculate the second deviation value V_diff2 between the measured value V_meas2 of the second measurement gear and the center ideal value V_ideal.

[0020] Determine whether the product of the first deviation value V_diff1 and the second deviation value V_diff2 is less than 0, and determine whether the first gear deviation value L_diff1 is equal to 1; if the product of the first deviation value V_diff1 and the second deviation value V_diff2 is less than 0, and the first gear deviation value L_diff1 is equal to 1, then determine the magnitude of the absolute value of the first deviation value V_diff1 and the absolute value of the second deviation value V_diff2; if the absolute value of the first deviation value V_diff1 is less than the absolute value of the second deviation value V_diff2, then set the center gear L_ideal as the first measurement gear L_meas1; if the absolute value of the first deviation value V_diff1 is greater than the absolute value of the second deviation value V_diff2, then set the center gear L_ideal as the second measurement gear L_meas2.

[0021] Update the central gear L_ideal to the statistics table, and set the gear with the most frequent measurements as the starting gear for the next measurement.

[0022] (If V_diff1*V_diff2<0, it means that in the two measurements, one value is greater than V_ideal and the other is less than V_ideal; if L_diff1 equals 1, it means that the two gear positions are adjacent, and V_ideal lies between the two measurements). If the condition is met, the absolute values ​​of the deviations of the first and second measurements from V_ideal are then determined. If the absolute value of the first deviation value V_diff1 is smaller, then the center ideal gear value (L_ideal) equals L_meas1; otherwise, L_ideal equals L_meas2.

[0023] This method further includes: if the product of the first deviation value V_diff1 and the second deviation value V_diff2 is less than 0, or the first gear deviation value L_diff1 is not equal to 1, then return to calculate the second gear deviation value L_diff2 based on the second deviation value V_diff2 and the step value V_offset; calculate the third measurement gear L_meas3 based on the second measurement gear L_meas2 and the second gear deviation value L_diff2, obtain the measurement value V_meas3 of the third measurement gear, and perform subsequent data processing. That is, return to calculate and determine whether the product of the second deviation value V_diff2 and the third deviation value V_diff3 is less than 0, and determine whether the second gear deviation value L_diff1 is equal to 1; and repeat the above steps. Repeat the above judgment conditions and steps, continuously update V_offset, and approximate V_ideal.

[0024] As L_diff continuously approaches 1, the error of V_offset continuously decreases, thereby obtaining the gear value closest to the set center ideal, and adding the current gear value L_ideal to the statistics. The center ideal gear is counted for each time, and the gear with the most counts is used to update the measurement starting gear L_meas1.

[0025] The step of calculating the second measurement gear L_meas2 based on the first measurement gear L_meas1 and the first gear deviation value L_diff1, and obtaining the measurement value V_meas2 of the second measurement gear, further includes:

[0026] Calculate the absolute value D_fabs based on the measured value V_meas1 from the first measurement and the measured value V_meas2 from the second measurement, where D_fabs = |V_meas2 - V_meas1|; calculate the absolute value L_fabs based on the measured value L_meas1 from the first measurement and L_meas2 from the second measurement, where L_fabs = |L_meas2 - L_meas1|; calculate the step value V_offset based on the absolute value D_fabs and the absolute value L_fabs from the measurement, where V_offset = D_fabs / L_fabs; update the step value V_offset.

[0027] The calculation of the first deviation value V_diff1 between the measured value V_meas1 of the first measurement gear and the center ideal value V_ideal includes: V_diff1 = V_ideal - V_meas1.

[0028] The step of calculating the first gear deviation value L_diff1 based on the first deviation value V_diff1 and the step value V_offset includes: L_diff1 = V_diff1 / V_offset.

[0029] The calculation of the second measurement gear L_meas2 based on the first measurement gear L_meas1 and the first gear deviation value L_diff1 includes: L_meas2 = L_meas1 + L_diff1. It can be seen that the positive or negative value of L_diff1 controls the increase or decrease of the second measurement gear value.

[0030] The calculation of the second deviation value V_diff2 between the measured value V_meas2 of the second measurement gear and the center ideal value V_ideal includes: V_diff2 = V_ideal - V_meas2.

[0031] The first gear deviation value L_diff1 is calculated based on the first deviation value V_diff1 and the step value V_offset, wherein the step value V_offset is set to be greater than 0. Especially during the first measurement, an error in V_offset is allowed.

[0032] Based on experience, the distribution of gear positions generally conforms to a Gaussian distribution, and the gear position with the most statistical occurrences is the center value of the Gaussian distribution. Using the center value of the Gaussian distribution as the starting gear position, and since this starting gear position value is closest to other gear position values, a fast search effect can be achieved.

[0033] The principle of the method for quickly finding the ideal programming value of an electric fuse provided by this invention is as follows:

[0034] Ideally, the target parameter value increases or decreases with a fixed step value as the fuse setting increases. Different fuse settings are measured to obtain different target parameter values, aiming to find the target parameter value closest to the set ideal setting. By subtracting the measured value (V_meas) from the set ideal value (V_ideal) and dividing by the step value (V_offset), we can determine the deviation (L_diff) between the current measured setting (L_meas) and the setting value (L_ideal) corresponding to V_ideal. The setting value L_ideal closest to V_ideal equals L_meas plus L_diff. However, due to systematic and random errors in the manufacturing process, there are differences in V_offset between each setting and between chips. If a fixed V_offset is used to calculate L_diff, the differences between different chips may require many iterations to approximate V_ideal, or it may be impossible to approximate the V_ideal of individual chips with significant differences.

[0035] The method of the present invention continuously updates the step value and the initial measurement range value based on each measurement value, and corrects the chip fuse range deviation in real time. If the actual measurement value is greater than V_ideal, the measurement range is adaptively reduced; if the actual measurement value is less than V_ideal, the measurement range is increased.

[0036] This invention proposes a fast adaptive fuse position approximation and positioning method, which enables the rapid finding of the position value closest to the ideal center value during the testing process, thereby reducing testing time, achieving high on-chip target parameter accuracy, and maintaining high programming efficiency, thus reducing testing time and saving costs.

[0037] Reference Figure 3 As shown, a second aspect of this disclosure provides an apparatus for rapidly finding the ideal burn-in value for an electric fuse, comprising:

[0038] The calculation module 210 is configured to calculate a first deviation value V_diff1 between the measured value V_meas1 of the first measurement gear and the center ideal value V_ideal; the calculation module 210 is further configured to calculate a first gear deviation value L_diff1 based on the first deviation value V_diff1 and the step value V_offset; the calculation module 210 is further configured to calculate a second measurement gear L_meas2 based on the first measurement gear L_meas1 and the first gear deviation value L_diff1, and obtain the measured value V_meas2 of the second measurement gear; the calculation module 210 is further configured to calculate a second deviation value V_diff2 between the measured value V_meas2 of the second measurement gear and the center ideal value V_ideal.

[0039] The judgment module 220 is configured to determine whether the product of the first deviation value V_diff1 and the second deviation value V_diff2 is less than 0, and to determine whether the first gear deviation value L_diff1 is equal to 1; the judgment module 220 is further configured to determine the magnitude of the first deviation value V_diff1 and the second deviation value V_diff2 if the product of the first deviation value V_diff1 and the second deviation value V_diff2 is less than 0, and the first gear deviation value L_diff1 is equal to 1.

[0040] The execution module 230 is configured to, if the first deviation value V_diff1 is greater than the second deviation value V_diff2, set the center gear L_ideal as the first measurement gear L_meas1; if the first deviation value V_diff1 is less than the second deviation value V_diff2, set the center gear L_ideal as the second measurement gear L_meas2; the execution module 230 is also configured to update the center gear L_ideal to the statistics table and set the gear with the most measurements as the starting gear for the next measurement.

[0041] In a third aspect of this disclosure, an electronic device includes: a memory and a processor; wherein the memory is configured to store one or more computer instructions, wherein the one or more computer instructions are executed by the processor to implement the method according to a first aspect of this disclosure.

[0042] The above embodiments are only used to explain the technical solutions of the present invention and are not intended to limit it. Those skilled in the art should understand that any modifications and equivalent substitutions that do not depart from the spirit and scope of the present invention should fall within the protection scope of the claims of the present invention.

Claims

1. A method for rapidly finding the ideal programming value for an electric fuse, characterized in that, include: Set the center ideal value V_ideal, and obtain the first measurement range L_meas1 and the measurement value V_meas1 of the first measurement range; Calculate the first deviation value V_diff1 between the measured value V_meas1 of the first measurement gear and the center ideal value V_ideal; Calculate the first gear deviation value L_diff1 based on the first deviation value V_diff1 and the step value V_offset; The second measurement gear L_meas2 is calculated based on the first measurement gear L_meas1 and the first gear deviation value L_diff1, and the measurement value V_meas2 of the second measurement gear is obtained. Calculate the second deviation value V_diff2 between the measured value V_meas2 of the second measurement setting and the center ideal value V_ideal; Determine whether the product of the first deviation value V_diff1 and the second deviation value V_diff2 is less than 0, and determine whether the first gear deviation value L_diff1 is equal to 1; If the product of the first deviation value V_diff1 and the second deviation value V_diff2 is less than 0, and the first gear deviation value L_diff1 is equal to 1, then determine the magnitude of the absolute value of the first deviation value V_diff1 and the absolute value of the second deviation value V_diff2. If the absolute value of the first deviation value V_diff1 is less than the absolute value of the second deviation value V_diff2, then the center gear L_ideal is set to the first measurement gear L_meas1; if the absolute value of the first deviation value V_diff1 is greater than the absolute value of the second deviation value V_diff2, then the center gear L_ideal is set to the second measurement gear L_meas2. Update the center gear L_ideal and step value V_offset to the statistics table, and set the gear with the most frequent measurements as the starting gear and step value for the next measurement; The step of calculating the second measurement gear L_meas2 based on the first measurement gear L_meas1 and the first gear deviation value L_diff1, and obtaining the measurement value V_meas2 of the second measurement gear, further includes: Calculate the absolute value D_fabs based on the measured value V_meas1 of the first measurement gear and the measured value V_meas2 of the second measurement gear, D_fabs=|V_meas2-V_meas1|; Calculate the absolute value of the measurement gear L_fabs based on the first measurement gear L_meas1 and the second measurement gear L_meas2, L_fabs = |L_meas2 - L_meas1|; The step value V_offset is calculated based on the absolute value of the measured value D_fabs and the absolute value of the measurement range L_fabs, where V_offset = D_fabs / L_fabs; Update the step value V_offset.

2. The method for rapidly finding the ideal burning value of an electric fuse according to claim 1, characterized in that, Also includes: If the product of the first deviation value V_diff1 and the second deviation value V_diff2 is less than 0, or if the first gear deviation value L_diff1 is not equal to 1, then return: Calculate the second gear deviation value L_diff2 based on the second deviation value V_diff2 and the step value V_offset; The third measurement gear L_meas3 is calculated based on the second measurement gear L_meas2 and the deviation value L_diff2 of the second gear, and the measurement value V_meas3 of the third measurement gear is obtained, as well as subsequent data processing.

3. The method for rapidly finding the ideal burning value of an electric fuse according to claim 1, characterized in that, The calculation of the first deviation value V_diff1 between the measured value V_meas1 of the first measurement gear and the central ideal value V_ideal includes: V_diff1 = V_ideal - V_meas1.

4. The method for rapidly finding the ideal burning value of an electric fuse according to claim 1, characterized in that, The step of calculating the first gear deviation value L_diff1 based on the first deviation value V_diff1 and the step value V_offset includes: L_diff1 = V_diff1 / V_offset.

5. The method for rapidly finding the ideal burning value of an electric fuse according to claim 1, characterized in that, The step of calculating the second measurement gear L_meas2 based on the first measurement gear L_meas1 and the first gear deviation value L_diff1 includes: L_meas2 = L_meas1 + L_diff1.

6. The method for rapidly finding the ideal burning value of an electric fuse according to claim 1, characterized in that, The calculation of the second deviation value V_diff2 between the measured value V_meas2 of the second measurement setting and the central ideal value V_ideal includes: V_diff2 = V_ideal - V_meas2.

7. The method for rapidly finding the ideal burning value of an electric fuse according to claim 1, characterized in that, The first gear deviation value L_diff1 is calculated based on the first deviation value V_diff1 and the step value V_offset, wherein the step value V_offset is set to be greater than 0.

8. A device for rapidly finding the ideal burning value of an electric fuse, characterized in that, include: The calculation module is configured to calculate the first deviation value V_diff1 between the measured value V_meas1 of the first measurement setting and the center ideal value V_ideal; The calculation module is also configured to calculate the first gear deviation value L_diff1 based on the first deviation value V_diff1 and the step value V_offset; The calculation module is also configured to calculate the second measurement gear L_meas2 based on the first measurement gear L_meas1 and the first gear deviation value L_diff1, and obtain the measurement value V_meas2 of the second measurement gear. The calculation module is also configured to calculate a second deviation value V_diff2 between the measured value V_meas2 of the second measurement setting and the central ideal value V_ideal; The judgment module is configured to determine whether the product of the first deviation value V_diff1 and the second deviation value V_diff2 is less than 0, and to determine whether the first gear deviation value L_diff1 is equal to 1. The judgment module is further configured to determine the magnitude of the first deviation value V_diff1 and the second deviation value V_diff2 if the product of the first deviation value V_diff1 and the second deviation value V_diff2 is less than 0 and the first gear deviation value L_diff1 is equal to 1. The execution module is configured to set the center gear L_ideal to the first measurement gear L_meas1 if the first deviation value V_diff1 is greater than the second deviation value V_diff2; and to set the center gear L_ideal to the second measurement gear L_meas2 if the first deviation value V_diff1 is less than the second deviation value V_diff2. The execution module is also configured to update the central gear L_ideal to the statistics table and set the gear with the most measurements as the starting gear for the next measurement. The step of calculating the second measurement gear L_meas2 based on the first measurement gear L_meas1 and the first gear deviation value L_diff1, and obtaining the measurement value V_meas2 of the second measurement gear, further includes: Calculate the absolute value D_fabs based on the measured value V_meas1 of the first measurement gear and the measured value V_meas2 of the second measurement gear, D_fabs=|V_meas2-V_meas1|; Calculate the absolute value of the measurement gear L_fabs based on the first measurement gear L_meas1 and the second measurement gear L_meas2, L_fabs = |L_meas2 - L_meas1|; The step value V_offset is calculated based on the absolute value of the measured value D_fabs and the absolute value of the measurement range L_fabs, where V_offset = D_fabs / L_fabs; Update the step value V_offset.

9. An electronic device, characterized in that, include: Memory and processor; The memory is used to store one or more computer instructions, wherein the one or more computer instructions are executed by the processor to implement the method according to any one of claims 1 to 7.

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