Double-base-island lead frame

Abstract

The utility model belongs to the technical field of integrated circuit packaging, and particularly discloses a double-base-island lead frame which comprises a frame body installed on an equipment bottom plate, the frame body is provided with a left-side base island, a right-side base island and Pin1 pins independently distributed at one corner of the frame body, and the left-side base island and the right-side base island are arranged on the frame body. A left side supporting rib is arranged at one end, far away from the right side base island, of the left side base island; one end, close to the right side base island, of the left side base island is downwards warped by 0.05 mm compared with the right side base island; according to the utility model, the Pin1 pin is independent from the left base island, so that the Pin1 pin is an independent pin unit, the function of the pin unit can be freely defined conveniently, the function of the Pin1 pin is increased, and meanwhile, one end, close to the right base island, of the left base island is tilted downwards by 0.05 mm compared with the right base island, so that when a product is bonded, the equipment bottom plate upwards supports the left base island; therefore, the left-side base island is deformed and recovered to the same height as the right-side base island, and the product bonding quality is ensured.

Description

Technical Field

[0001] This utility model relates to the field of integrated circuit packaging technology, specifically a dual-base island lead frame. Background Technology

[0002] The dual-base island leadframe has two separate base islands, namely the left base island and the right base island. This is generally to place different materials of adhesive to avoid circuit interference between the two chips (conductive or insulating adhesive), and also because of the product circuit structure and pin definition requirements.

[0003] Current existing dual-base island lead frames, such as Figure 4 As shown, it includes a left base island and a right base island. The left base island requires support ribs in two directions to ensure its stability and flatness. This stable structure of the left base island means that the lead frame Pin1 must be connected to the left base island.

[0004] However, due to the structure of Pin1 being connected to the base island, Pin1 has a single connection method in the product circuit structure, which occupies the resources of Pin1. When the product structure requires the base island to be disconnected from Pin1, the above function cannot be achieved. Therefore, we need to propose a dual base island lead frame to solve the above problems, so that it can ensure the stability and flatness of the left base island while disconnecting Pin1 from the left base scandium, thus increasing the function of Pin1. Summary of the Invention

[0005] The purpose of this invention is to provide a dual-base island lead frame that can ensure the stability and flatness of the left base island while disconnecting the Pin1 pin from the left base scandium, thereby increasing the functionality of the Pin1 pin and solving the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a dual-base island lead frame, comprising a frame body mounted on the equipment base plate, wherein the frame body is provided with a left base island, a right base island, and a Pin1 foot independently distributed at a corner of the frame body, wherein a left support rib is provided at the end of the left base island away from the right base island, and a right support rib is provided at the end of the right base island away from the left base island, wherein the end of the left base island closer to the right base island is tilted downwards by 0.05mm compared to the right base island.

[0007] Preferably, the left-side support rib is composed of two support bars with different widths, one of which has a width of 0.2 mm and the other has a width of less than 0.2 mm, and the two support bars are arranged in parallel.

[0008] Preferably, the right-side support rib is composed of two support plates of the same width, and the width of the support plate is less than 0.2 mm.

[0009] Preferably, the frame body is further provided with independent Pin2, Pin3, Pin4 and Pin5, which are distributed side by side with Pin1 on the same side of the frame body.

[0010] Preferably, the right base island is connected to the side adjacent to the right support rib with a Pin 6 foot, and the right base island is connected to the corner opposite to the left base island with a Pin 7 foot, and the Pin 7 foot and Pin 6 foot are arranged side by side.

[0011] Preferably, a second supporting rib is provided between Pin7 and the right base island, and between Pin6 and the right base island. The second supporting rib is integrally formed with Pin6, Pin7 and the right base island.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. This utility model separates Pin1 from the left base island, making Pin1 an independent pin unit. This facilitates the free definition of the function of the pin unit and increases the functionality of Pin1. At the same time, by tilting the end of the left base island closer to the right base island down by 0.05mm compared to the right base island, when bonding with the product, the equipment base plate supports the left base island upward, so that the deformation of the left base island returns to the same height as the right base island, ensuring the bonding quality of the product.

[0014] 2. This utility model ensures the supporting force of the load-bearing base island by cooperating with the left-side supporting rib and the left-side base island, thus ensuring the stability and flatness of the left-side base island. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a side view of the present invention.

[0017] Figure 3 This is a schematic diagram showing the gap between the left-side base island and the equipment base plate;

[0018] Figure 4 This is a schematic diagram of the existing dual-base island lead frame structure.

[0019] In the diagram: 1. Right side support rib; 2. Right side base island; 3. Left side base island; 4. Left side support rib; 5. Main frame; 6. Equipment base plate; 7. Second support rib. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-2 This utility model provides a technical solution: a dual-base island lead frame, including a frame body 5 installed on a device base plate 6. The frame body 5 is provided with a left base island 3, a right base island 2, and a Pin1 foot independently distributed at a corner of the frame body 5. A left support rib 4 is provided at the end of the left base island 3 away from the right base island 2, and a right support rib 1 is provided at the end of the right base island 2 away from the left base island 3. The end of the left base island 3 closer to the right base island 2 is tilted down by 0.05mm compared to the right base island 2.

[0022] By separating Pin1 from the left base island 3, Pin1 becomes an independent pin unit, which facilitates the free definition of the function of this pin unit and increases the functionality of Pin1. At the same time, by tilting the end of the left base island 3 closer to the right base island 2 downward by 0.05mm compared to the right base island 2, when bonding with the product, the equipment base plate 6 supports the left base island 3 upward, so that the deformation of the left base island 3 returns to the same height as the right base island 2, ensuring the bonding quality of the product.

[0023] To address the issue of unbalanced force on the left base island 3 during the actual stamping process due to the disconnection of Pin 1 from the left base island 3, and to prevent gaps from appearing at the junction of the left base island 3 and the equipment base plate 6 if this imbalance occurs, the problem is solved. Figure 3 As shown in the black box, this gap can cause the product to wobble during bonding, leading to product quality issues. Therefore, in the design, the left base island 3 is tilted downwards by 0.05mm relative to the right base island 2. Figure 2 As shown, when the product is bonded, the equipment base plate 6 supports the left base island 3 upwards. The left base island 3 deforms and returns to the same height as the right base island 2, thus avoiding [damage / damage]. Figure 3 The presence of hollow gaps ensures the production quality of the product.

[0024] The left support rib 4 is composed of two support bars with different widths. One of the support bars is 0.2mm wide, and the other support bar is less than 0.2mm wide. The two support bars are arranged in parallel, forming two sets of support rib structures on the side to ensure the support force of the left base island 3 and keep the left base island 3 stable and flat during stamping.

[0025] The right-side support rib 1 consists of two support plates of the same width, the width of which is less than 0.2mm. The right-side support rib 1 provides support to the right-side base island 2, which helps to maintain the stability of the right-side base island 2 during the stamping process.

[0026] The frame body 5 is also provided with independent Pin2, Pin3, Pin4 and Pin5. Pin2, Pin3, Pin4 and Pin5 are distributed side by side with Pin1 on the same side of the frame body 5. By setting multiple independent Pins, more signal channels are provided, enabling the chip to process multiple input and output signals simultaneously, thereby improving the overall performance and efficiency of the system.

[0027] The right base island 2 is connected to a Pin 6 on the side adjacent to the right support rib 1, and the right base island 2 is connected to a Pin 7 at the corner opposite to the left base island 3. The Pin 7 and Pin 6 are arranged side by side. The arrangement of the Pin 7 and Pin 6 facilitates the connection of the right base island 2 to external circuits or chips, improving the convenience of connection.

[0028] A second support rib 7 is provided between Pin 7 and the right base island 2, and between Pin 6 and the right base island 2. The second support rib 7 is integrally formed with Pin 6, Pin 7 and the right base island 2. The second support rib increases the connection strength between Pin 6 and the right base island 2, and between Pin 7 and the right base island 2, thereby improving the connection strength between Pin 6 and Pin 7.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dual die island leadframe comprising a frame body (5) mounted on a device baseplate (6), characterized in that: The frame body (5) is provided with a left base island (3), a right base island (2) and a Pin1 pin independently distributed at a corner of the frame body (5), the left base island (3) is provided with a left supporting rib (4) away from the right base island (2), and the right base island (2) is provided with a right supporting rib (1) away from the left base island (3).

2. The dual die island leadframe of claim 1, wherein: The left supporting rib (4) is composed of two supporting strips with different widths, one of which has a width of 0.2mm, and the other has a width less than 0.2mm, and the two supporting strips are arranged in parallel.

3. A dual die paddle leadframe as claimed in claim 2, wherein: The right supporting rib (1) is composed of two supporting strips with the same width, and the width of the supporting strip is less than 0.2mm.

4. The dual die island leadframe of claim 3, wherein: The frame body (5) is also provided with independent Pin2 pin, Pin3 pin, Pin4 pin and Pin5 pin, which are distributed in parallel with the Pin1 pin on the same side of the frame body (5).

5. A dual die paddle leadframe as claimed in claim 4, wherein: The side adjacent to the right supporting rib (1) of the right base island (2) is connected with a Pin6 pin, and the side opposite to the left base island (3) of the right base island (2) is connected with a Pin7 pin, and the Pin7 pin and the Pin6 pin are arranged in parallel.

6. A dual die paddle leadframe as claimed in claim 5, wherein: The Pin7 pin and the right base island (2) and the Pin6 pin and the right base island (2) are provided with a second supporting rib (7), and the second supporting rib (7) is integrally formed with the Pin6 pin, the Pin7 pin and the right base island (2).

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