1. A method of producing a solid-state imaging device comprising the steps of:
forming a light receiving unit and a pixel circuit in a first surface side of a substrate;
grinding a second surface side of said substrate to make said substrate thinner;
forming a transparent first insulation film on said second surface of said substrate;
forming a second insulation film on said first insulation film; and
injecting charges having the same polarity as a signal charge in an interface between said first insulation film and said second insulation film or in said second insulation film,
wherein, in the steps of forming said first insulation film and said second insulation film, said first insulation film and said second insulation film are formed to have thicknesses so as to obtain a transmittance of an incidence light higher than when using only said first insulation film and
wherein the light receiving unit extends only partially into said substrate from the first surface side of the substrate towards the second surface side of said substrate.
2. A method of producing a solid-state imaging device as set forth in claim 1, after the step of forming said second insulation film, further comprising a step of forming a protection film on said second insulation film, said protection film preventing a charge from spreading to outside, and said charge being retained in an interface of said first insulation film and said second insulation film or in said second insulation film.
3. A method of producing a solid-state imaging device as set forth in claim 1, wherein, in the step of injecting said charges, a charged electrode is opposed to said second surface side of said substrate.
4. A method of producing a solid-state imaging device as set forth in claim 1, wherein, in the step of injecting said charges, light is irradiated to said second surface side of said substrate.
5. A method of producing a solid-state imaging device as set forth in claim 1, wherein, in the step of forming said first insulation film, a silicon oxide film is formed.
6. A method of producing a solid-state imaging device as set forth in claim 1, wherein, in the step of forming said second insulation film, a silicon nitride film is formed.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A method of servicing a wellbore comprising:
placing a composition comprising a surfactant package comprising a cationic surfactant and anionic surfactant in the wellbore;
wherein the surfactant package when contacted with an aqueous solution forms a viscosified composition in the presence of less than about 30 wt. % of a hydrotrope.
2. The method of claim 1 wherein the cationic surfactant has a carbon chain length of from about 8 to about 24.
3. The method of claim 1 wherein the cationic surfactant comprises quaternary ammonium salt, ethoxylated quaternary ammonium salts, amine oxides, or a combination thereof.
4. The method of claim 1 wherein the cationic surfactant comprises stearyltrimethylammonium chloride, cetyltrimethylammonium tosylate, octyltrimethylammonium chloride, erucyl bis-(hydroxyethyl)methylammonium chloride, erucyl trimethylammonium chloride cetyltrimethylammonium chloride, cetyltrimethylammonium bromide, myristyltrimethylammonium chloride, myristyltrimethylammonium bromide, dodecyltrimethylammonium chloride, dodecyltrimethylammonium bromide, decyltrimethylammonium chloride, decyltrimethylammonium bromide, or a combination thereof.
5. The method of claim 1 wherein the cationic surfactant is present in the surfactant package in an amount of from about 0.01 wt. % to about 99.99 wt. % based on the total weight of the surfactant package.
6. The method of claim 1 wherein the anionic surfactant has a carbon chain length of from about 8 to about 24.
7. The method of claim 1 wherein the anionic surfactant comprises alkali salts of acids, alkali salts of fatty acids, alkaline salts of acids, sodium salts of acid, sodium salts of fatty acid, alkyl sulphates, alkyl ethoxylate, sulphates, sulfonates, soaps, or a combination thereof.
8. The method of claim 1 wherein the anionic surfactant comprises sodium oleate, sodium dodecylbenzenesulfonate, sodium decanoate, sodium octyl sulfate, sodium caprylate sodium stearate, sodium myristate, sodium laurate, sodium cetyl sulfate, sodium myristyl sulfate, sodium lauryl sulfate, sodium decyl sulfate, or a combination thereof.
9. The method of claim 1 wherein the anionic surfactant is present in the surfactant package in an amount of from about 0.01 wt. % to about 99.99 wt. % based on the total weight of the surfactant package.
10. The method of claim 1 wherein the surfactant package has cationic surfactant:anionic surfactant ratio of from 1:100 to 100:1.
11. The method of claim 1 wherein the surfactant package is contacted with the aqueous solution in an amount of from about 0.01 grams to about 20 grams per 80 grams of the aqueous solution.
12. The method of claim 1 wherein the aqueous solution comprises water, brine, a wellbore servicing fluid, or a combination thereof.
13. The method of claim 12 wherein the brine comprises ammonium chloride, potassium chloride, sodium chloride, zinc bromide, calcium chloride, calcium bromide, sodium bromide, potassium formate, sodium formate, cesium formate or a combination thereof.
14. The method of claim 12 wherein the wellbore servicing fluid comprises cement slurries, drilling fluids, spacer fluids, fracturing fluids, gravel pack fluids, workover fluids, completion fluids, or a combination thereof.
15. The method of claim 1 wherein the viscosified composition is solids free.
16. The method of claim 1 wherein the viscosified composition has a viscosity of from about 0.001 Pa*s to about 100,000 Pa*s at a temperature of from about 10\xb0 C. to about 200\xb0 C.
17. The method of claim 1 wherein the viscosified composition has a zero shear viscosity of from about 0.001 Pa*s to about 100,000 Pa*s at a temperature of from about 10\xb0 C. to about 200\xb0 C.
18. The method of claim 1 wherein the viscosified composition has a complex viscosity of from about 10 Pa*s to about 10,000 Pa*s at a frequency range of from about 0.00001 Hz to about 1000 Hz.
19. The method of claim 11 wherein the viscosified composition has a storage modulus of from about 0.001 Pa to about 1,000 Pa at a frequency range of from about 0.00001 Hz to about 1000 Hz.
20. The method of claim 11 wherein the viscosified composition has a loss modulus of from about 0.001 Pa to about 1,000 Pa at a frequency range of from about 0.00001 Hz to about 1000 Hz.
21. The method of claim 1 further comprising contacting the viscosified composition with a viscosity breaker.
22. The method of claim 21 wherein the viscosity breaker comprises a hydrocarbon fluid, an internal breaker, or a combination thereof.
23. The method of claim 1 wherein the viscosified composition comprises a solids free post perforation pill or a gravel pack fluid loss pill.
24. A wellbore servicing fluid comprising a surfactant package comprising a cationic surfactant and anionic surfactant; wherein the surfactant package when contacted with an aqueous solution forms a viscosified composition in the presence of less than about 30 wt. % of a hydrotrope.