Package structure of electronic modules with silicone sealing frame and the manufacturing method thereof
A package structure of electronic modules includes two substrates and a sealing frame. The sealing frame comprises two first silicone frames, a second silicone frame and two crystalline interfaces. The sealing frame is disposed between and within the two substrates to form a space thereof. The sealing frame serves as an excellent moisture barrier of the package structure due to the intrinsic properties of silicone. Meanwhile, the silicone can withstand the corrosion of the polar solvents and/or the plasticizers. A manufacturing method of the package structure is disclosed in this invention as well.
1. A package structure, comprising:
two substrates; and
a sandwich type sealing frame configured between the substrates and sealing the substrates along their inner circumferences to form a space, the sealing frame comprising:
two first silicone frames adhering to the substrates along their inner circumferences, wherein the first silicone frames contain a chemical formula I with a first percentage and a chemical formula II with a second percentage; and
a second silicone frame coupled between the first silicone frames, wherein the second silicone frame contains the chemical formula I with a third percentage and the chemical formula II with a fourth percentage;
wherein the chemical formula I is:
chemical formula II is:
wherein the first percentage is greater than the third percentage, and the second percentage is less than the fourth percentage.
2. The package structure of claim 1 , wherein the first silicone frames are at least partially cured to adhere to the substrates and the second silicone frame is cured to adhere to the first silicone frames.
3. The package structure of claim 2 , wherein the chemical formula II is substantially aligned along —Si—O—Si— chain after curing.
4. The package structure of claim 1 , wherein two crystalline interfaces are formed between the first silicone frames and the second silicone frame.
5. The package structure of claim 1 , wherein the first silicone frames are modified by increasing a proportion of addition-type silicone.
6. The package structure of claim 1 , wherein the first silicone frames are modified by adding Epoxy, Acrylic Acid or a combination thereof.
7. The package structure of claim 1 , wherein the second silicone frame is softer than the first silicone frames.
8. The package structure of claim 1 , wherein amounts of the chemical formula II within the second silicone frame is greater than amounts of the chemical formula II within each of the first silicone frames by 0.1% to 60%, on a weight or volume basis.
9. The package structure of claim 1 , wherein amounts of the carbon atoms of each of the first silicone frames is greater than amounts of the carbon atoms of the second silicone frame by about 0.01 to 60 mole percent.
10. The package structure of claim 1 , wherein amounts of the carbon atoms of each of the first silicone frames is greater than amounts of the carbon atoms of the second silicone frame by about 0.01 to 60 mole percent.
11. The package structure of claim 1 , wherein the substrates are selected from a group consisting of polyimide (PI), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), metal, glass, glass fiber and liquid crystal polymer.
12. The package structure of claim 1 , wherein further comprises an auxiliary sealing frame, disposed between the substrates and surrounding the first silicone frames and second silicone frame around their outer circumference.
13. The package structure of claim 1 , wherein the first silicone frames mainly contain the chemical formula I which is chemically cross-linked with the substrates after curing and generates strong bonding force with the substrates, and the second silicone frame mainly contains the chemical formula II which forms high crystalline structure after curing and has good performances of blocking the moisture.
14. The package structure of claim 12 , wherein the auxiliary sealing frame is made of material selected from a group consisting of epoxy, acrylic resin, UV glue, Polyethylene (PE), ethylene vinyl acetate (EVA) and Polypropylene (PP).
15. The package structure of claim 12 , wherein the auxiliary sealing frame mainly contains the chemical formula I of:
16. The package structure of claim 12 , wherein the auxiliary sealing frame is a single-layer structure.
17. The package structure of claim 12 , wherein the auxiliary sealing frame surrounds around the first silicone frames and the second silicone frame with contact to the first silicone frames and/or second silicone frame.
18. The package structure of claim 12 , wherein the auxiliary sealing frame surrounds around the first silicone frames and the second silicone frame without contact to the first silicone frames and/or second silicone frame.
19. The package structure of claim 1 , wherein an intermolecular force of the first silicone frames and an intermolecular force of the second silicone frame are almost equal.
20. The package structure of claim 1 , wherein the second silicone frame is made of a heat cured material, and the first silicone frames can bear a curing temperature of the second silicone frame.