Method for opening a metal packaged device

Abstract

This invention discloses a method for opening metal-packaged devices, belonging to the field of electronic component opening technology. It solves the problems of difficulty in securing small, smooth, and easily held metal-packaged devices for extended periods, and the dangers of using a grinding wheel to thin the metal package shell. The opening method includes: first, selecting two adjacent edges on the upper surface of the metal package shell, and grinding bevels on both edges; then grinding bevels on the opposite sides of these bevels repeatedly until the weld seams are exposed; pushing a cutting blade into the angle, advancing horizontally, utilizing the property that "two intersecting straight lines define a plane" between the two weld seams, with the metal material above and below the two weld seams providing balanced support, keeping the cutting blade stable and parallel to the plane of the angle, without damaging the internal structure, causing the metal cover to detach, thus completing the opening. This invention enables "fast, efficient, and safe" opening of metal-packaged devices.

Description

Technical Field

[0001] This invention relates to the field of opening technology for metal packaged electronic components, and more particularly to a method for opening metal packaged devices. Background Technology

[0002] Unpacking is a critical step in DPA and failure analysis processes, and the quality of unpacking directly affects the accuracy of subsequent tests and even the analysis results of the entire batch. According to the relevant provisions of GJB 4027A-2006, strict protective measures must be taken during the unpacking process of metal-packaged devices to avoid introducing contamination or abnormal damage.

[0003] Due to the small size, thinness, and fragility of metal-encapsulated devices, opening them is a highly difficult and risky process. Directly using the blade-cutting weld seam method provided by GJB4027A-2006 can easily damage the metal-encapsulated device body. Grinding the shell with a grinding wheel presents challenges in terms of fixation and operational hazards. Because the smooth surface of the metal-encapsulated shell makes it difficult to hold it securely for extended periods, and because the metal-encapsulated device is small and has a significantly lower inertia ratio compared to the high-speed rotating grinding wheel, it is prone to breakage upon contact with the high-speed rotating grinding wheel. This results in unsatisfactory grinding effects, a low safety factor, and negatively impacts the results of further experiments, making it difficult to meet the requirements of research and production schedules. Summary of the Invention

[0004] In view of the above analysis, the present invention aims to provide a method for opening metal packaged devices, in order to solve at least one of the technical problems of existing metal packaged devices being small in size and smooth and not easy to hold securely for a long time, and the difficulty in fixing and the danger of operation when the metal packaged device shell is thinned by grinding with a grinding wheel.

[0005] The objective of this invention is mainly achieved through the following technical solutions:

[0006] This invention provides a method for opening a metal-packaged device, the method comprising the following steps:

[0007] Step S01: Prepare serrated needle-nose pliers and curved picks;

[0008] Step S02: Use pickaxe pliers to clamp the metal packaged device, so that one edge l on the upper surface of the metal packaged device is parallel to the axis of the grinding wheel. Starting from one end of edge l, it makes orthogonal contact with the high-speed rotating grinding wheel. The upper surface of the metal packaged device, the plane formed by the contact point and the axis of the grinding wheel forms an angle of 60° or 45°. Grind from one end of edge l to the other end, so that the edge l is ground away to form a bevel β.

[0009] Step S03: Following the method in step S02, grind the other edge m adjacent to edge l, so that edge m forms a bevel γ after the edge is ground away.

[0010] Step S04: Using serrated needle-nose pliers, bite the bevel β formed after grinding in step S02 with one end of the upper jaw and bite the lower surface of the metal package device with one end of the lower jaw. Use the bevel β to achieve a more stable clamping at a 60° or 45° tilt angle. Align the edge n, which is parallel to the edge l on the upper surface of the metal package housing, with the grinding wheel.

[0011] Step S05: Grind edge n using the same grinding method as edge l in step S02, so that edge n is ground away to form a bevel δ; repeatedly grind the bevel δ according to the operation in step S02 until the bevel δ exposes weld a.

[0012] Step S06: After forming a more stable clamp by operating the inclined surface γ in the same way as the inclined surface β in step S04, align the edge g parallel to the edge m on the upper surface of the metal package with the grinding wheel; then, grind the edge g to remove the edge in the same way as in step S05 to form the inclined surface α; repeatedly grind the inclined surface α in the same way as in step S02 until the weld seam b is exposed.

[0013] Step S07: Fix the metal packaged device on the bench vise. Align the sharp blade with the angle between the two welds generated in steps S05 and S06. Push the blade into the angle and advance it horizontally. The blade intersects the two welds generated in steps S05 and S06 at a 45° angle. Utilize the property that "two intersecting straight lines determine a plane" of the two welds at the angle, and use the metal material above and below the two welds to evenly support and keep the blade stable, advancing it parallel to the plane of the angle to cut in without damaging the internal structure. This will cause the metal cover to fall off, completing the opening.

[0014] Furthermore, the metal packaging shell of the metal packaged device is generally rectangular.

[0015] Furthermore, in step S02, edge l is any edge on the top surface of the metal package housing, which is the place where the metal package housing transitions from the top surface to the side surface.

[0016] Furthermore, in step S02, the rotation speed of the grinding wheel is 2000–2400 r / min.

[0017] Furthermore, in step S02, the relative movement speed between the clamping device and the grinding wheel in the direction parallel to the grinding wheel axis is 0.8-1.2 cm / s. The clamping device is ground from one end of the edge to the other at a speed of 0.8-1.2 cm / s, so that the edge is ground away to form a bevel β.

[0018] Furthermore, in step S05, on the upper surface of the metal package housing, edge m is adjacent to edge l, and edge n is parallel to edge l.

[0019] Furthermore, inclined plane β and inclined plane γ are two adjacent rough surfaces; inclined plane δ and inclined plane α are two adjacent rough surfaces.

[0020] Furthermore, in steps S05 and S06, weld a and weld b are two intersecting welds.

[0021] Furthermore, in step S01, the beak-shaped pliers are formed by heat-processing the tips of the needle-nose pliers to create a downward bend, with the tips bent into a beak shape.

[0022] Furthermore, the metal-packaged devices include a STA0638A / SF1186B2 microwave circuit, a CF1050Y10S filter, a 3CG130CS transistor, and a C-XO75-NAGRA-61.44MHz crystal oscillator.

[0023] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0024] (1) The opening method provided by the present invention can significantly reduce the difficulty and risk of opening metal packaged devices, ensure the integrity of the internal structure of the opened sample, and significantly improve the effectiveness, safety and efficiency of the operation, so as to achieve "fast, good and safe" opening.

[0025] (2) In view of the fact that the smooth metal packaging shell is not easy to be clamped for a long time, the present invention first adopts a roundabout strategy to construct a rough surface (including inclined plane β, inclined plane δ, inclined plane γ and inclined plane α) from scratch to build the ability to clamp for a long time: the friction between one end of the upper jaw of the needle-nose pliers and the rough inclined plane is conducive to stable clamping, and the clamping after the fixed tilt angle allows the metal packaging device 1 to contact the lower jaw of the needle-nose pliers and be subjected to force. The friction and extrusion force between the metal packaging device 1 and the upper jaw form a stable torque balance, which prevents the metal packaging device 1 from flying off or slipping during subsequent polishing.

[0026] (3) Based on the long-term stable clamping capability, the present invention grinds intersecting welds (weld a and weld b), cuts in from the intersection of the two welds, and with the help of the property that "two intersecting straight lines determine the fixed plane", the metal materials above and below the two welds provide balanced support, keeping the blade stable and parallel to the direction of the intersection plane to advance and cut in, thereby achieving efficient opening without damaging the internal structure.

[0027] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages may become apparent from the description or be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained through the embodiments described and the accompanying drawings, which are particularly pointed out. Attached Figure Description

[0028] The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0029] Figure 1 This is a schematic flowchart of the opening method for the metal packaged device of the present invention;

[0030] Figure 2 This is an operational illustration of Embodiment 1 of the present invention, using the SMJ320C6701GLPW14 processor as an example;

[0031] Figure 3 The present invention utilizes serrated needle-nose pliers and rough bevels formed after grinding off the edges to achieve a stable clamping at an angle of 60° or 45°.

[0032] Figure 4 This is a schematic diagram of two orthogonal welds;

[0033] Figure 5 A schematic diagram illustrating how the cutting edge of the blade is aligned with the angle between the two weld seams.

[0034] Figure 6 A schematic diagram showing how to push the cutting edge of a blade into the intersection of two weld seams;

[0035] Figure 7 This is a schematic diagram showing the cutting edge of a blade completing the opening of a metal-encapsulated device.

[0036] Figure label:

[0037] 1-Metal-encapsulated device; 2-Crane bend pliers; 3-Grinding wheel; 4-Blade. Detailed Implementation

[0038] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0039] This invention provides a method for opening a metal-packaged device, such as... Figure 1 As shown, the opening method includes the following steps:

[0040] Step S01: Prepare serrated needle-nose pliers and crooked pick pliers 2;

[0041] In step S01 above, the curved pick pliers 2 are formed by heat-processing the tip of the needle-nose pliers to create a downward bend, which is shaped like a pick's beak, thus obtaining the curved pick pliers 2.

[0042] Step S02: Use pickaxe pliers 2 to clamp the metal packaged device 1, as follows:Figure 2 As shown, one edge l on the upper surface of the metal packaging shell of the metal packaging device 1 is parallel to the axis of the grinding wheel 3, and starts from one end of the edge l to make orthogonal contact with the high-speed rotating grinding wheel 3. The plane formed by the upper surface of the metal packaging shell, the contact point, and the axis of the grinding wheel 3 forms an inclination angle of 60° or 45°. Grinding is performed from one end of the edge l to the other end, so that the edge l forms a bevel β after the edge is ground away.

[0043] In step S02 above, edge l is any edge of the metal package housing, which is the place where the metal package housing transitions from the top to the side.

[0044] In step S02 above, the inclined plane β can be understood as a rough surface constructed from scratch to address the characteristic that the smooth metal packaging shell is not easy to hold stably for a long time. The friction helps to build the ability to hold stably for a long time.

[0045] In step S02 above, the rotation speed of the grinding wheel 3 is 2000-2400 r / min.

[0046] In step S02 above, as Figure 2 As shown, when there is an extension of other materials (e.g., ceramic materials) outside the metal sealing edge of the metal package device 1, the plane formed by the upper surface of the housing, the contact point, and the axis of the grinding wheel 3 adopts a 60° tilt angle; except in this case, a 45° tilt angle is adopted.

[0047] In step S02 above, the edge l is ground from one end to the other at a speed of 0.8-1.2 cm / s, so that the edge l is ground away to form a bevel β. The speed of 0.8-1.2 cm / s refers to the relative movement speed between the clamping device and the grinding wheel 3 in a direction parallel to the axis of the grinding wheel 3. This invention controls this relative movement speed within the above range because: if the speed is too slow, the clamping device is easily ground by the high-speed rotating grinding wheel 3, causing imbalance at different positions on the edge l, which can easily lead to damage or detachment; while if the speed is too fast, sufficient grinding cannot be guaranteed.

[0048] Step S03: Following the method in step S02, grind the other edge m adjacent to edge l, so that edge m forms a bevel γ after the edge is ground away.

[0049] The inclined plane γ can be understood as a rough surface constructed from scratch to address the characteristic that the smooth metal packaging shell is not easy to hold stably for a long time. The friction helps to build the ability to hold stably for a long time.

[0050] Step S04: Using serrated needle-nose pliers, one end of the upper jaw grips the bevel β formed after grinding in step S02, and the other end of the lower jaw grips the lower surface of the metal packaged device 1, as shown. Figure 3As shown, a more stable clamping at a tilt angle of 60° or 45° is achieved by using the inclined plane β, and the edge n parallel to the edge l on the upper surface of the metal package is aligned with the grinding wheel 3.

[0051] In step S04 above, "more stable clamping" is relative to clamping the metal packaged device 1 without the bevel. "More stable clamping" means that the friction between one end of the jaws of the needle-nose pliers and the rough bevel β is conducive to stable clamping. Moreover, the clamping after the fixed tilt angle is generated allows the metal packaged device 1 to contact the lower jaw of the needle-nose pliers and bear the force. The friction and squeezing force between the metal packaged device 1 and the upper jaw form a stable torque balance, which prevents the metal packaged device 1 from flying off or slipping during subsequent polishing.

[0052] It should be explained that, in addition to gravity, the clamped metal packaged device 1 is also subjected to the downward frictional force of the grinding wheel 3, the lateral frictional force of the moving grinding wheel 3, and the reaction force generated by the device pressing against the grinding wheel 3 during grinding. Since the needle-nose pliers provide the upward support force from the contact of the lower jaws (which can balance the downward frictional force of the grinding wheel 3), the frictional force between one end of the upper jaws and the rough inclined surface (which can balance the lateral frictional force of the moving grinding wheel 3 on the device), and the squeezing force of the upper jaws on the device (which can balance the reaction force generated by the device pressing against the grinding wheel 3 during grinding), a more stable clamping of the device can be formed.

[0053] Step S05: Grind edge n using the same method as edge l in step S02, so that edge n forms a bevel δ after the edge is ground away. Since a more stable clamping effect can be formed as in step S04, repeat the operation in step S02 on bevel δ until the bevel δ exposes weld a. Figure 3 As shown.

[0054] In step S05 above, edge n is located on the upper surface of the package housing and is parallel to edge l; that is, the metal package housing of the metal package device 1 is generally rectangular, and when its upper surface is rectangular or close to rectangular, edge l is one of the short sides of the rectangle, and edge n is another short side parallel to l.

[0055] In step S05 above, the relationship between edge n, edge m and edge l is as follows: on the upper surface of the encapsulation shell, edge m is adjacent to edge l, and edge n is parallel to edge l.

[0056] In step S05 above, the process of forming a "more stable clamping" is as follows: In addition to gravity, the device is subjected to the downward frictional force of the grinding wheel 3, the lateral frictional force of the grinding wheel 3 during movement, and the reaction force generated by the device squeezing the grinding wheel 3 during grinding. The needle-nose pliers provide the upward support force from the contact of the lower jaws (which can balance the downward frictional force of the grinding wheel 3), the frictional force between one end of the upper jaw and the rough inclined surface (which can balance the lateral frictional force of the grinding wheel 3 on the device during movement), and the squeezing force of the upper jaw on the device (which can balance the reaction force generated by the device squeezing the grinding wheel 3 during grinding). Therefore, the device can be clamped in a more stable clamping manner.

[0057] Step S06: Operate the inclined plane γ in the same way as the inclined plane β in step S04 to form a more stable clamping structure. Align the edge g, which is parallel to edge m on the upper surface of the metal packaging shell, with the grinding wheel 3. Then, grind the edge g to remove its edge, forming the inclined plane α, as described in step S05. Repeat the operation in step S02 on the inclined plane α until the weld seam b is exposed. Figure 4 As shown;

[0058] In step S06 above, specifically, serrated needle-nose pliers are used, with one end of the upper jaw biting the bevel γ and the other end of the lower jaw biting the lower surface of the metal package device 1. The bevel γ is used to achieve a more stable clamping at a 60° or 45° tilt angle. The edge g on the upper surface of the metal package housing, which is parallel to the edge m, is aligned with the grinding wheel 3. The edge g is made parallel to the axis of the grinding wheel 3 and makes orthogonal contact with the high-speed rotating grinding wheel 3 starting from one end of the edge g. The plane formed by the upper surface of the metal package housing, the contact point, and the axis of the grinding wheel 3 forms a 60° or 45° tilt angle. The edge g is ground from one end to the other, so that the edge g is ground away to form the bevel α. Then, the bevel α is repeatedly ground until the weld seam b is exposed.

[0059] It should be emphasized that in step S05 above, by firmly holding the inclined surface β with serrated needle-nose pliers, the inclined surface δ can be ground out at the edge n parallel to the edge l on the upper surface of the metal packaging device 1, and the inclined surface δ is repeatedly ground to a depth until the weld seam a is exposed; in step S06 above, by firmly holding the inclined surface γ with serrated needle-nose pliers, the inclined surface α can be ground out at the edge g parallel to the edge m on the upper surface of the metal packaging device 1, and the inclined surface α is repeatedly ground to a depth until the weld seam b is exposed; wherein, the inclined surface β and the inclined surface γ are two adjacent rough surfaces; the inclined surface δ and the inclined surface α are two adjacent rough surfaces; and the weld seam a and the weld seam b are two intersecting weld seams.

[0060] Step S07: Fix the metal encapsulation device 1 on the bench vise. Align the sharp blade 4 with the intersection of the two weld seams generated in steps S05 and S06, and push the blade 4 into the intersection. Push it forward horizontally until the blade intersects the two weld seams generated in steps S05 and S06 at a 45° angle. Utilize the property that "two intersecting straight lines determine a plane" of the two weld seams at the intersection, and use the metal material above and below the two weld seams to evenly support and keep the blade 4 stable, pushing it in parallel to the plane of the intersection (moving and cutting along the diagonal of edge g and edge n) without damaging the internal structure. This will cause the metal cover to fall off, completing the opening of the metal encapsulation device 1.

[0061] It should be noted that the metal packaged device 1 of the present invention includes a STA0638A / SF1186B2 type microwave circuit, a CF1050Y10S type filter, a 3CG130CS type transistor, a C-XO75-NAGRA-61.44MHz type crystal oscillator and an SMJ320C6701GLPW14 type processor.

[0062] The metal encapsulation device 1 of the present invention can have a minimum volume of 2.5mm × 2.5mm × 1mm (length × width × height).

[0063] The opening method of the metal packaged device 1 proposed in this invention is applicable to micro-sized metal packaged devices 1, as well as large-sized metal packaged devices 1 including metal shell packaged modules; it is applicable to dual in-line packaged devices 1, J-leaded metal packaged devices 1, and flat metal packaged devices 1.

[0064] In summary, the opening method provided by this invention can significantly reduce the difficulty and risk of opening the metal packaged device 1, ensure the integrity of the internal structure of the opened sample, and significantly improve the effectiveness, safety and efficiency of the operation, achieving "fast, good and safe" opening.

[0065] Example 1

[0066] This embodiment takes the SMJ320C6701GLPW14 processor as an example. The method for opening the metal package device 1 includes the following steps:

[0067] Step S01: Prepare serrated needle-nose pliers and crooked pick pliers 2;

[0068] Step S02: Use pickaxe pliers 2 to clamp the metal packaged device 1, as follows: Figure 2As shown, one edge l on the upper surface of the metal packaging shell of the metal packaging device 1 is parallel to the axis of the grinding wheel 3 and is orthogonally contacted with the high-speed rotating grinding wheel 3 starting from one end of the edge l. The plane formed by the upper surface of the metal packaging shell, the contact point, and the axis of the grinding wheel 3 is inclined at a 60° angle. The edge l is ground from one end to the other at a speed of 1.0 cm / s, so that the edge l is ground away to form a bevel β.

[0069] In step S02 above, the rotation speed of the grinding wheel 3 is 2200 r / min.

[0070] Step S03: Following the method in step S02, grind the other edge m adjacent to edge l, so that edge m forms a bevel γ after the edge is ground away.

[0071] The inclined plane γ can be understood as a rough surface constructed from scratch to address the characteristic that the smooth metal packaging shell is not easy to hold stably for a long time. The friction helps to build the ability to hold stably for a long time.

[0072] Step S04: Using serrated needle-nose pliers, one end of the upper jaw grips the bevel β formed after grinding in step S02, and the other end of the lower jaw grips the lower surface of the metal packaged device 1, as shown. Figure 3 As shown, a more stable clamping at a 60° tilt angle is achieved by using the inclined plane β, and the edge n parallel to the edge l on the upper surface of the metal packaging shell is aligned with the grinding wheel 3.

[0073] Step S05: Grind edge n using the same method as edge l in step S02, so that edge n forms a bevel δ after the edge is ground away. Since a more stable clamping effect can be formed as in step S04, repeat the operation in step S02 on bevel δ until the bevel δ exposes weld a. Figure 3 As shown.

[0074] Step S06: After forming a more stable clamp by operating the inclined surface γ in the same way as the inclined surface β in step S04, align the edge g parallel to the edge m on the upper surface of the metal package with the grinding wheel 3; then, grind the edge g to remove the edge in the same way as in step S05 to form the inclined surface α; repeat the operation in step S02 on the inclined surface α until the weld seam b is exposed.

[0075] Step S07: Fix the metal package device 1 on the bench vise. Align the sharp blade 4 with the intersection of the two weld seams generated in steps S05 and S06, and push the blade 4 into the intersection. Push it forward horizontally until the blade intersects the two weld seams generated in steps S05 and S06 at a 45° angle. Utilize the property that "two intersecting straight lines determine a plane" of the two weld seams at the intersection, and use the metal material above and below the two weld seams to evenly support and keep the blade 4 stable, pushing it in parallel to the plane of the intersection without damaging the internal structure. This will cause the metal cover to fall off, completing the unpacking of the SMJ320C6701GLPW14 processor.

[0076] Example 2

[0077] This embodiment takes the 3CG130CS type transistor as an example. The method for opening the metal package device 1 includes the following steps:

[0078] Step S01: Prepare serrated needle-nose pliers and crooked pick pliers 2;

[0079] Step S02: Use pickaxe pliers 2 to clamp the metal encapsulation device 1, so that one edge l of the upper surface of the metal encapsulation shell of the metal encapsulation device 1 is parallel to the axis of the grinding wheel 3, and starts from one end of the edge l to make orthogonal contact with the high-speed rotating grinding wheel 3. The upper surface of the metal encapsulation shell, the contact point, and the plane formed by the axis of the grinding wheel 3 form a 45° angle. Grind from one end of the edge l to the other end at a speed of 1.2 cm / s, so that the edge l is ground away to form a bevel β.

[0080] In step S02 above, the rotation speed of grinding wheel 3 is 2400 r / min.

[0081] Step S03: Following the method in step S02, grind the other edge m adjacent to edge l, so that edge m forms a bevel γ after the edge is ground away.

[0082] The inclined plane γ can be understood as a rough surface constructed from scratch to address the characteristic that the smooth metal packaging shell is not easy to hold stably for a long time. The friction helps to build the ability to hold stably for a long time.

[0083] Step S04: Using serrated needle-nose pliers, one end of the upper jaws bites the bevel β formed after grinding in step S02, and the other end of the lower jaws bites the lower surface of the metal package device 1. The bevel β is used to achieve a more stable clamping at a 60° tilt angle. The edge n on the upper surface of the metal package housing that is parallel to the edge l is aligned with the grinding wheel 3.

[0084] Step S05: Grind edge n using the same method as edge l in step S02, so that edge n forms a bevel δ after the edge is ground away. Since a more stable clamping effect can be formed as in step S04, repeat the operation in step S02 on bevel δ until the bevel δ exposes weld a. Figure 3 As shown.

[0085] Step S06: After forming a more stable clamp by operating the inclined surface γ in the same way as the inclined surface β in step S04, align the edge g parallel to the edge m on the upper surface of the metal package with the grinding wheel 3; then, grind the edge g to remove the edge in the same way as in step S05 to form the inclined surface α; repeat the operation in step S02 on the inclined surface α until the weld seam b is exposed.

[0086] Step S07: Fix the metal packaged device 1 on the bench vise. Align the sharp blade 4 with the intersection of the two weld seams generated in steps S05 and S06, and "push" the blade 4 in from the intersection. Push it forward horizontally until the blade intersects the two weld seams generated in steps S05 and S06 at a 45° angle. Utilize the property that "two intersecting straight lines determine a plane" of the two weld seams at the intersection, and use the metal material above and below the two weld seams to evenly support and keep the blade 4 stable, pushing it in parallel to the direction of the intersection plane without damaging the internal structure. This will cause the metal cover to fall off, completing the opening of the 3CG130CS type transistor.

[0087] In summary, this invention addresses the issue that smooth metal packaging shells are difficult to hold stably for extended periods. It employs a roundabout strategy to create a rough surface from scratch, thereby building the ability to hold stably for a long time. The friction between one end of the upper jaw of the needle-nose pliers and the rough inclined surface facilitates stable clamping. Furthermore, the clamping at a fixed tilt angle allows the metal packaging device 1 to contact the lower jaw of the needle-nose pliers and bear force. The friction and compressive forces between the metal packaging device 1 and the upper jaw create a stable torque balance, preventing the metal packaging device 1 from flying off or slipping during subsequent polishing.

[0088] Based on the long-term stable clamping ability, two intersecting welds are ground out. The blade 4 is used to cut into the corner of the two welds. Taking advantage of the property that "two intersecting straight lines determine the fixed plane" of the two welds at the corner, the metal material above and below the two welds provides balanced support, keeping the blade 4 stable and parallel to the direction of the corner plane as it cuts in without damaging the internal structure. This allows the metal cover to fall off, achieving "fast, good, and safe" opening - greatly reducing the difficulty and risk of operation, ensuring the integrity of the internal structure of the opened sample, and significantly improving the effectiveness, safety, and efficiency of the operation.

[0089] This invention utilizes the concepts of constructing auxiliary surfaces, torque design, constructing intersecting straight lines to determine a plane, and using the metal materials above and below the weld to evenly support the direction of the force. It creates friction from the smooth shape of the object being operated on, thereby achieving a balanced clamping torque. Based on this long-term stable clamping capability, intersecting welds are ground out. The blade is then inserted from the intersection point. With the help of the property that "two intersecting straight lines determine a fixed plane", the metal materials above and below the two welds provide even support, keeping the blade 4 stable and parallel to the direction of the intersecting plane, thus achieving efficient opening without damaging the internal structure.

[0090] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for opening a metal-packaged device, characterized in that, Includes the following steps: Step S01: Prepare serrated needle-nose pliers and curved picks; Step S02: Use pickaxe pliers to clamp the metal packaged device, so that one edge l on the upper surface of the metal packaged device is parallel to the axis of the grinding wheel. Starting from one end of edge l, it makes orthogonal contact with the high-speed rotating grinding wheel. The upper surface of the metal packaged device, the plane formed by the contact point and the axis of the grinding wheel forms an angle of 60° or 45°. Grind from one end of edge l to the other end, so that the edge l is ground away to form a bevel β. Step S03: Following the method in step S02, grind the other edge m adjacent to edge l, so that edge m forms a bevel γ after the edge is ground away. Step S04: Using serrated needle-nose pliers, bite the bevel β formed after grinding in step S02 with one end of the upper jaw and bite the lower surface of the metal package device with one end of the lower jaw. Use the bevel β to achieve a more stable clamping at a 60° or 45° tilt angle. Align the edge n, which is parallel to the edge l on the upper surface of the metal package housing, with the grinding wheel. Step S05: Grind edge n using the same grinding method as edge l in step S02, so that edge n is ground away to form a bevel δ; repeatedly grind the bevel δ according to the operation in step S02 until the bevel δ exposes weld a. Step S06: After forming a more stable clamp by operating the inclined surface γ in the same way as the inclined surface β in step S04, align the edge g parallel to the edge m on the upper surface of the metal package with the grinding wheel; then, grind the edge g to remove the edge in the same way as in step S05 to form the inclined surface α; repeatedly grind the inclined surface α in the same way as in step S02 until the weld seam b is exposed. Step S07: Fix the metal packaged device on the bench vise. Align the sharp blade with the angle between the two welds generated in steps S05 and S06. Push the blade into the angle and advance it horizontally. The blade intersects the two welds generated in steps S05 and S06 at a 45° angle. Utilize the property that "two intersecting straight lines determine a plane" of the two welds at the angle, and use the metal material above and below the two welds to evenly support and keep the blade stable, advancing it parallel to the plane of the angle to cut in without damaging the internal structure. This will cause the metal cover to fall off, completing the opening.

2. The method for opening a metal-encapsulated device according to claim 1, characterized in that, The metal packaging shell of the metal packaging device is generally rectangular.

3. The method for opening a metal-encapsulated device according to claim 2, characterized in that, In step S02, edge l is any edge on the top surface of the metal package housing, which is the place where the metal package housing transitions from the top surface to the side surface.

4. The method for opening a metal-encapsulated device according to claim 3, characterized in that, In step S02, the rotation speed of the grinding wheel is 2000-2400 r / min.

5. The method for opening a metal-encapsulated device according to claim 1, characterized in that, In step S02, the relative movement speed between the clamping device and the grinding wheel in the direction parallel to the grinding wheel axis is 0.8-1.2 cm / s. The clamping device is ground from one end of the edge to the other at a speed of 0.8-1.2 cm / s, so that the edge is ground away to form a bevel β.

6. The method for opening a metal-encapsulated device according to claim 1, characterized in that, In step S05, on the upper surface of the metal package housing, edge m is adjacent to edge l, and edge n is parallel to edge l.

7. The method for opening a metal-encapsulated device according to claim 1, characterized in that, The inclined plane β and the inclined plane γ are two adjacent rough surfaces; the inclined plane δ and the inclined plane α are two adjacent rough surfaces.

8. The method for opening a metal-encapsulated device according to claim 1, characterized in that, In steps S05 and S06, weld a and weld b are two intersecting welds.

9. The method for opening a metal-encapsulated device according to claim 1, characterized in that, In step S01, the bent pick pliers are formed by heat-processing the tips of the pick pliers to create a downward bend, and the bend is in the shape of a pick's beak.

10. The method for opening a metal-encapsulated device according to any one of claims 1 to 9, characterized in that, The metal-packaged devices include a STA0638A / SF1186B2 microwave circuit, a CF1050Y10S filter, a 3CG130CS transistor, and a C-XO75-NAGRA-61.44MHz crystal oscillator.

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