Silica gel board used for circuit board compressing and compressing method using the board
A technology of circuit boards and iron plates, which is applied in the field of burning iron plates and pressing circuit boards using the burnt iron plates, can solve the problems of insufficient FPC bonding force, uneven surface of FPC, and affecting the yield of FPC products, etc. The effect of achieving excellent flatness
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Embodiment 1
[0028] Under the pressing condition of 80 tons of pressure, the use of a burnt iron plate with a thickness ratio of silicone rubber to iron plate of about 0.6 to 1.5:1 is used to provide the effect of correcting the parallelism of the circuit board in the pressing system. The test results evaluate the effectiveness of the burnt iron plate to correct the parallelism by the flatness of the FPC, the warpage of the burnt iron plate and the service life. The measurement of the experimental results was evaluated as described above. The results are shown in Table 1 below.
[0029] Table 1
[0030]
[0031] FPC flatness: ○ means good flatness, × means poor flatness
[0032] Warpage of burnt iron plate: ○ indicates good, × indicates poor
[0033] As shown in Table 1, when the thickness ratio of silicone rubber to iron plate ranges from 0.6 to 1.5:1, such as 1:1, burnt iron plate sample A (silicone rubber hardness 45HR) has better efficacy. However, if the hardness of silicone ru...
Embodiment 2
[0035] In the range of silicone rubber hardness from 40 to 80, burnt iron plates with different hardness ranges and specific thickness ratios were selected. Under the pressing condition of 80 tons of pressure, the effect of providing circuit board parallelism correction in the pressing system was tested. . The test results evaluate the effectiveness of the burnt iron plate to correct the parallelism by the flatness of the FPC, the warpage of the burnt iron plate and the service life. The measurement of the experimental results was evaluated as described above. The results are shown in Table 2 below.
[0036] Table 2
[0037]
[0038] FPC flatness: ○ means good flatness, × means poor flatness
[0039] Warpage of burnt iron plate: ○ indicates good, × indicates poor
[0040] As shown in Table 2, when the silicone rubber hardness ranges from 40 to 50HR (for example, the hardness is 45HR, sample E and sample G), the thickness ratio of the silicone rubber to the iron plate of...
Embodiment 3
[0042] In the range of silicone rubber hardness from 50 to 80, burnt iron plates with different hardness ranges and specific thickness ratios were selected. Under the pressing condition of 80 tons of pressure, the effect of providing circuit board parallelism correction in the pressing system was tested. . The test results evaluate the effectiveness of the burnt iron plate to correct the parallelism by the flatness of the FPC, the warpage of the burnt iron plate and the service life. The measurement of the experimental results was evaluated as described above. The results are shown in Table 3 below.
[0043] table 3
[0044]
[0045]
[0046] FPC flatness: ○ means good flatness, × means poor flatness
[0047] Warpage of burnt iron plate: ○ indicates good, × indicates poor
[0048] As shown in Table 3, when the silicone rubber hardness ranges from 50 to 65HR (for example, the hardness is 60HR, sample I and sample K), the thickness ratio of the silicon rubber to the iron...
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