Stable encapsulant fluid capable of undergoing reversible Diels-Alder polymerization
View Patent ↗An encapsulant fluid is provided comprising a mixture of a diene-containing compound and a dienophilic compound. At least one of the diene-containing and the dienophilic compounds is protected so that the compounds do not substantially react with each other at room temperature. The diene-containing and the dienophilic compounds undergo a reversible Diels-Alder polymerization reaction at a polymerization temperature above room temperature to form a solid debondable polymeric encapsulant. Also provided are methods for forming slider assemblies and methods for patterning a slider surface using the encapsulant.
1. An encapsulant fluid, comprising a mixture of a diene-containing compound and a dienophilic compound, wherein
at least one of the diene-containing and the dienophilic compounds is protected so that the compounds do not substantially react with each other at room temperature, and
the diene-containing and the dienophilic compounds are capable of undergoing a reversible Diels-Alder polymerization reaction at a polymerization temperature above room temperature to form a solid debondable polymeric encapsulant.
2. The encapsulant fluid of claim 1 , having a viscosity of no more than 800 centistokes.
3. The encapsulant fluid of claim 2 , wherein the viscosity is no more than 500 centistokes.
4. The encapsulant fluid of claim 3 , wherein the viscosity is 10 to 200 centistokes.
5. The encapsulant fluid of claim 1 , wherein the diene-containing compound contains at least one cyclic group.
6. The encapsulant fluid of claim 5 , wherein the cyclic group is a furan group.
7. The encapsulant fluid of claim 6 , wherein the diene-containing compound contains a plurality of furan groups.
8. The encapsulant fluid of claim 7 , wherein the diene-containing compound is a bis(furan), tris(furan) or tetrakis(furan).
9. The encapsulant fluid of claim 1 , wherein the diene-containing compound contains silicon.
10. The encapsulant fluid of claim 1 , wherein the dienophilic compound contains at least one maleimide group.
11. The encapsulant fluid of claim 10 , wherein the dienophilic compound contains a plurality of maleimide groups.
12. The encapsulant fluid of claim 1 , wherein the dienophilic compound is protected.
13. The encapsulant fluid of claim 12 , wherein the dienophilic compound is protected by a capping furanic moiety.
14. The encapsulant fluid of claim 13 , wherein the capping furanic moiety is a monofuranic moiety.
15. The encapsulant fluid of claim 1 , wherein the diene-containing compound is protected.
16. The encapsulant fluid of claim 15 , wherein the diene-containing compound is protected by a protecting moiety.
17. The encapsulant fluid of claim 16 , wherein the protecting moiety is a butadiene or isoprene.
18. The encapsulant fluid of claim 1 , wherein compounds exhibit sufficiently low reactivity such that the viscosity of encapsulant fluid does not substantially change for at least 24 hours at room temperature.
19. The encapsulant fluid of claim 18 , wherein the viscosity of encapsulant fluid does not substantially change for at least 7 days at room temperature.